build(deps-dev): bump @types/webpack from 4.39.2 to 4.39.8

Bumps [@types/webpack](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/webpack) from 4.39.2 to 4.39.8.
- [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>

yarn.lock

@@ -1141,9 +1141,9 @@
     source-map "^0.6.1"
 
 "@types/webpack@^4.32.1":
-  version "4.39.2"
-  resolved "https://registry.yarnpkg.com/@types/webpack/-/webpack-4.39.2.tgz#fcaa85607a9bdd0e8f86a350f239ff08aede8584"
-  integrity sha512-3c7+vcmyyIi3RBoOdXs8k3E9rQVIy6yOBqK0DFk6lnJ76JUfbDBWbEf1JflzyPQf56W4ToE+2YPnbxbucniW5w==
+  version "4.39.8"
+  resolved "https://registry.yarnpkg.com/@types/webpack/-/webpack-4.39.8.tgz#8083a4eb850ea02961ef6161465434c9b478851f"
+  integrity sha512-lkJvwNJQUPW2SbVwAZW9s9whJp02nzLf2yTNwMULa4LloED9MYS1aNnGeoBCifpAI1pEBkTpLhuyRmBnLEOZAA==
   dependencies:
     "@types/anymatch" "*"
     "@types/node" "*"