Bump webpack from 5.6.0 to 5.9.0

Bumps [webpack](https://github.com/webpack/webpack) from 5.6.0 to 5.9.0.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v5.6.0...v5.9.0)

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

package.json

@@ -49,7 +49,7 @@
         "tfx-cli": "^0.8.3",
         "ts-loader": "^8.0.11",
         "typescript": "^4.1.2",
-        "webpack": "^5.6.0",
+        "webpack": "^5.9.0",
         "webpack-cli": "^4.2.0"
     }
 }