Bump webpack from 4.45.0 to 4.46.0 (#15580)

Bumps [webpack](https://github.com/webpack/webpack) from 4.45.0 to 4.46.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.45.0...v4.46.0)

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package.json

@@ -163,7 +163,7 @@
     "throng": "^4.0.0",
     "tiny-queue": "^0.2.1",
     "uuid": "^8.3.1",
-    "webpack": "^4.45.0",
+    "webpack": "^4.46.0",
     "webpack-assets-manifest": "^4.0.1",
     "webpack-bundle-analyzer": "^4.3.0",
     "webpack-cli": "^3.3.12",