chore(deps): automerge updates to @types/chrome dependency

These updates weren't automerged because the major version of the
dependency is 0, and we disabled autoupdating a dev dependency if its
major version is 0 due to possible unexpected breaking changes.

This CL makes an exception for @types/chrome so it is always automerged.

Change-Id: I170bdce76657d8715de36ea49ada0366e394ff03
diff --git a/renovate.json b/renovate.json
index 40c95c8..f50b9ae 100644
--- a/renovate.json
+++ b/renovate.json
@@ -12,6 +12,15 @@
       "automerge": true,
       "automergeType": "pr",
       "autoApprove": true
+    },
+    {
+      "description": "Automerge updates to @types/chrome even if the major version is 0",
+      "matchDatasources": ["npm"],
+      "matchPackageNames": ["@types/chrome"],
+      "matchUpdateTypes": ["minor", "patch", "pin"],
+      "automerge": true,
+      "automergeType": "pr",
+      "autoApprove": true
     }
   ]
 }