Bump webpack-assets-manifest from 3.1.1 to 4.0.0 (#15288)

Bumps [webpack-assets-manifest](https://github.com/webdeveric/webpack-assets-manifest) from 3.1.1 to 4.0.0.
- [Release notes](https://github.com/webdeveric/webpack-assets-manifest/releases)
- [Commits](https://github.com/webdeveric/webpack-assets-manifest/compare/v3.1.1...v4.0.0)

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package.json

@@ -164,7 +164,7 @@
     "tiny-queue": "^0.2.1",
     "uuid": "^8.3.1",
     "webpack": "^4.44.2",
-    "webpack-assets-manifest": "^3.1.1",
+    "webpack-assets-manifest": "^4.0.0",
     "webpack-bundle-analyzer": "^4.3.0",
     "webpack-cli": "^3.3.12",
     "webpack-merge": "^5.7.3",