Bump @types/webpack from 4.41.17 to 4.41.21

Bumps [@types/webpack](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/webpack) from 4.41.17 to 4.41.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/webpack)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "@types/node": "^14.0.23",
     "@types/react": "^16.9.43",
     "@types/react-dom": "^16.9.8",
-    "@types/webpack": "^4.41.17",
+    "@types/webpack": "^4.41.21",
     "@types/webpack-env": "^1.15.2",
     "@typescript-eslint/eslint-plugin": "^3.6.0",
     "@typescript-eslint/parser": "^3.6.1",