Add elix and lit packages

These will be used by the Workflows feature.

Bug: twpowertools:74
Change-Id: Id2616e0544ac5194e265833cc99cae2c46324efd
diff --git a/package.json b/package.json
index 7afaf6a..a460742 100644
--- a/package.json
+++ b/package.json
@@ -41,9 +41,11 @@
   "dependencies": {
     "@material/tooltip": "^12.0.0",
     "async-mutex": "^0.3.2",
+    "elix": "^15.0.1",
     "google-protobuf": "^3.19.3",
     "grpc-web": "^1.2.1",
     "idb": "^6.1.2",
+    "lit": "^2.3.1",
     "poll-until-promise": "^3.6.1",
     "semver": "^7.3.5",
     "sw-xhr": "^0.0.3"