Remove CleanWebpackPlugin in favor of output.clean

Change-Id: I12065803a0e806358070690f76f69dbae86a46b6
diff --git a/package-lock.json b/package-lock.json
index b2b43f4..03df080 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,6 @@
       "version": "0.0.0",
       "license": "MIT",
       "devDependencies": {
-        "clean-webpack-plugin": "^4.0.0-alpha.0",
         "copy-webpack-plugin": "^9.0.1",
         "json5": "^2.2.0",
         "path": "^0.12.7",
@@ -88,28 +87,12 @@
       "integrity": "sha512-C6N5s2ZFtuZRj54k2/zyRhNDjJwwcViAM3Nbm8zjBpbqAdZ00mr0CFxvSKeO8Y/e03WVFLpQMdHYVfUd6SB+Hw==",
       "dev": true
     },
-    "node_modules/@types/glob": {
-      "version": "7.1.4",
-      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.4.tgz",
-      "integrity": "sha512-w+LsMxKyYQm347Otw+IfBXOv9UWVjpHpCDdbBMt8Kz/xbvCYNjP+0qPh91Km3iKfSRLBB0P7fAMf0KHrPu+MyA==",
-      "dev": true,
-      "dependencies": {
-        "@types/minimatch": "*",
-        "@types/node": "*"
-      }
-    },
     "node_modules/@types/json-schema": {
       "version": "7.0.8",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.8.tgz",
       "integrity": "sha512-YSBPTLTVm2e2OoQIDYx8HaeWJ5tTToLH67kXR7zYNGupXMEHa2++G8k+DczX2cFVgalypqtyZIcU19AFcmOpmg==",
       "dev": true
     },
-    "node_modules/@types/minimatch": {
-      "version": "3.0.5",
-      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.5.tgz",
-      "integrity": "sha512-Klz949h02Gz2uZCMGwDUSDS1YBlTdDDgbWHi+81l29tQALUtvz4rAYi5uoVhE5Lagoq6DeqAUlbrHvW/mXDgdQ==",
-      "dev": true
-    },
     "node_modules/@types/node": {
       "version": "16.3.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-16.3.1.tgz",
@@ -356,31 +339,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/array-uniq": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
-      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
-      "dev": true
-    },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "node_modules/braces": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
@@ -441,21 +399,6 @@
         "node": ">=6.0"
       }
     },
-    "node_modules/clean-webpack-plugin": {
-      "version": "4.0.0-alpha.0",
-      "resolved": "https://registry.npmjs.org/clean-webpack-plugin/-/clean-webpack-plugin-4.0.0-alpha.0.tgz",
-      "integrity": "sha512-+X6mASBbGSVyw8L9/1rhQ+vS4uaQMopf194kX7Aes8qfezgCFL+qv5W0nwP3a0Tud5kUckARk8tFcoyOSKEjhg==",
-      "dev": true,
-      "dependencies": {
-        "del": "^4.1.1"
-      },
-      "engines": {
-        "node": ">=10.0.0"
-      },
-      "peerDependencies": {
-        "webpack": ">=4.0.0 <6.0.0"
-      }
-    },
     "node_modules/clone-deep": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/clone-deep/-/clone-deep-4.0.1.tgz",
@@ -482,12 +425,6 @@
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       "dev": true
     },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
-      "dev": true
-    },
     "node_modules/copy-webpack-plugin": {
       "version": "9.0.1",
       "resolved": "https://registry.npmjs.org/copy-webpack-plugin/-/copy-webpack-plugin-9.0.1.tgz",
@@ -527,61 +464,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/del": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/del/-/del-4.1.1.tgz",
-      "integrity": "sha512-QwGuEUouP2kVwQenAsOof5Fv8K9t3D8Ca8NxcXKrIpEHjTXK5J2nXLdP+ALI1cgv8wj7KuwBhTwBkOZSJKM5XQ==",
-      "dev": true,
-      "dependencies": {
-        "@types/glob": "^7.1.1",
-        "globby": "^6.1.0",
-        "is-path-cwd": "^2.0.0",
-        "is-path-in-cwd": "^2.0.0",
-        "p-map": "^2.0.0",
-        "pify": "^4.0.1",
-        "rimraf": "^2.6.3"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/del/node_modules/array-union": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
-      "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
-      "dev": true,
-      "dependencies": {
-        "array-uniq": "^1.0.1"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/del/node_modules/globby": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
-      "integrity": "sha1-9abXDoOV4hyFj7BInWTfAkJNUGw=",
-      "dev": true,
-      "dependencies": {
-        "array-union": "^1.0.1",
-        "glob": "^7.0.3",
-        "object-assign": "^4.0.1",
-        "pify": "^2.0.0",
-        "pinkie-promise": "^2.0.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/del/node_modules/globby/node_modules/pify": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
-      "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/dir-glob": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
@@ -795,12 +677,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/fs.realpath": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
-      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
-      "dev": true
-    },
     "node_modules/function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
@@ -819,26 +695,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/glob": {
-      "version": "7.1.7",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
-      "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
-      "dev": true,
-      "dependencies": {
-        "fs.realpath": "^1.0.0",
-        "inflight": "^1.0.4",
-        "inherits": "2",
-        "minimatch": "^3.0.4",
-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
-      },
-      "engines": {
-        "node": "*"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
     "node_modules/glob-parent": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-6.0.0.tgz",
@@ -938,16 +794,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/inflight": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
-      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
-      "dev": true,
-      "dependencies": {
-        "once": "^1.3.0",
-        "wrappy": "1"
-      }
-    },
     "node_modules/inherits": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
@@ -1005,39 +851,6 @@
         "node": ">=0.12.0"
       }
     },
-    "node_modules/is-path-cwd": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/is-path-cwd/-/is-path-cwd-2.2.0.tgz",
-      "integrity": "sha512-w942bTcih8fdJPJmQHFzkS76NEP8Kzzvmw92cXsazb8intwLqPibPPdXf4ANdKV3rYMuuQYGIWtvz9JilB3NFQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/is-path-in-cwd": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-2.1.0.tgz",
-      "integrity": "sha512-rNocXHgipO+rvnP6dk3zI20RpOtrAM/kzbB258Uw5BWr3TpXi861yzjo16Dn4hUox07iw5AyeMLHWsujkjzvRQ==",
-      "dev": true,
-      "dependencies": {
-        "is-path-inside": "^2.1.0"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/is-path-inside": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/is-path-inside/-/is-path-inside-2.1.0.tgz",
-      "integrity": "sha512-wiyhTzfDWsvwAW53OBWF5zuvaOGlZ6PwYxAbPVDhpm+gM09xKQGjBq/8uYN12aDvMxnAnq3dxTyoSoRNmg5YFg==",
-      "dev": true,
-      "dependencies": {
-        "path-is-inside": "^1.0.2"
-      },
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/is-plain-object": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/is-plain-object/-/is-plain-object-2.0.4.tgz",
@@ -1203,18 +1016,6 @@
         "node": ">=6"
       }
     },
-    "node_modules/minimatch": {
-      "version": "3.0.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
-      "dev": true,
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/minimist": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
@@ -1254,24 +1055,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/object-assign": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
-      "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/once": {
-      "version": "1.4.0",
-      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
-      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
-      "dev": true,
-      "dependencies": {
-        "wrappy": "1"
-      }
-    },
     "node_modules/onetime": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/onetime/-/onetime-5.1.2.tgz",
@@ -1329,15 +1112,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/p-map": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/p-map/-/p-map-2.1.0.tgz",
-      "integrity": "sha512-y3b8Kpd8OAN444hxfBbFfj1FY/RjtTd8tzYwhUqNYXx0fXx2iX4maP4Qr6qhIKbQXI02wTLAda4fYUbDagTUFw==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/p-try": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.2.0.tgz",
@@ -1366,21 +1140,6 @@
         "node": ">=8"
       }
     },
-    "node_modules/path-is-absolute": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
-      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/path-is-inside": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/path-is-inside/-/path-is-inside-1.0.2.tgz",
-      "integrity": "sha1-NlQX3t5EQw0cEa9hAn+s8HS9/FM=",
-      "dev": true
-    },
     "node_modules/path-key": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -1417,36 +1176,6 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
-    "node_modules/pify": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
-      "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
-      "dev": true,
-      "engines": {
-        "node": ">=6"
-      }
-    },
-    "node_modules/pinkie": {
-      "version": "2.0.4",
-      "resolved": "https://registry.npmjs.org/pinkie/-/pinkie-2.0.4.tgz",
-      "integrity": "sha1-clVrgM+g1IqXToDnckjoDtT3+HA=",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/pinkie-promise": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/pinkie-promise/-/pinkie-promise-2.0.1.tgz",
-      "integrity": "sha1-ITXW36ejWMBprJsXh3YogihFD/o=",
-      "dev": true,
-      "dependencies": {
-        "pinkie": "^2.0.0"
-      },
-      "engines": {
-        "node": ">=0.10.0"
-      }
-    },
     "node_modules/pkg-dir": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
@@ -1562,18 +1291,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/rimraf": {
-      "version": "2.7.1",
-      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.7.1.tgz",
-      "integrity": "sha512-uWjbaKIK3T1OSVptzX7Nl6PvQ3qAGtKEtVRjRuazjfL3Bx5eI409VZSqgND+4UNnmzLVdPj9FqFJNPqBZFve4w==",
-      "dev": true,
-      "dependencies": {
-        "glob": "^7.1.3"
-      },
-      "bin": {
-        "rimraf": "bin.js"
-      }
-    },
     "node_modules/run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -2004,12 +1721,6 @@
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       "dev": true
     },
-    "node_modules/wrappy": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
-    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
@@ -2082,28 +1793,12 @@
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       "dev": true
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-    "@types/glob": {
-      "version": "7.1.4",
-      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-7.1.4.tgz",
-      "integrity": "sha512-w+LsMxKyYQm347Otw+IfBXOv9UWVjpHpCDdbBMt8Kz/xbvCYNjP+0qPh91Km3iKfSRLBB0P7fAMf0KHrPu+MyA==",
-      "dev": true,
-      "requires": {
-        "@types/minimatch": "*",
-        "@types/node": "*"
-      }
-    },
     "@types/json-schema": {
       "version": "7.0.8",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.8.tgz",
       "integrity": "sha512-YSBPTLTVm2e2OoQIDYx8HaeWJ5tTToLH67kXR7zYNGupXMEHa2++G8k+DczX2cFVgalypqtyZIcU19AFcmOpmg==",
       "dev": true
     },
-    "@types/minimatch": {
-      "version": "3.0.5",
-      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.5.tgz",
-      "integrity": "sha512-Klz949h02Gz2uZCMGwDUSDS1YBlTdDDgbWHi+81l29tQALUtvz4rAYi5uoVhE5Lagoq6DeqAUlbrHvW/mXDgdQ==",
-      "dev": true
-    },
     "@types/node": {
       "version": "16.3.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-16.3.1.tgz",
@@ -2322,28 +2017,6 @@
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       "dev": true
     },
-    "array-uniq": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/array-uniq/-/array-uniq-1.0.3.tgz",
-      "integrity": "sha1-r2rId6Jcx/dOBYiUdThY39sk/bY=",
-      "dev": true
-    },
-    "balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
-      "dev": true
-    },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dev": true,
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
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diff --git a/package.json b/package.json
index 0562556..0044d04 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,6 @@
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diff --git a/webpack.config.js b/webpack.config.js
index 6843f0d..bdd988e 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -1,4 +1,3 @@
-const {CleanWebpackPlugin} = require('clean-webpack-plugin');
 const path = require('path');
 const json5 = require('json5');
 const CopyWebpackPlugin = require('copy-webpack-plugin');
@@ -35,15 +34,9 @@
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       filename: '[name].bundle.js',
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-        keep(asset) {
-          return asset.includes('static/') || asset.includes('manifest.json') ||
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+      clean: true,
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       new WebpackShellPluginNext({
         onBuildEnd: {
           scripts: