Update hard-source-webpack-plugin requirement from 0.12.0 to 0.13.1 (#3611)

Updates the requirements on [hard-source-webpack-plugin](https://github.com/mzgoddard/hard-source-webpack-plugin) to permit the latest version.
- [Release notes](https://github.com/mzgoddard/hard-source-webpack-plugin/releases)
- [Changelog](https://github.com/mzgoddard/hard-source-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mzgoddard/hard-source-webpack-plugin/commits/v0.13.1)

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

package.json

@@ -131,7 +131,7 @@
 		"gulp-uglify": "3.0.1",
 		"gulp-util": "3.0.8",
 		"gulp-yaml": "2.0.2",
-		"hard-source-webpack-plugin": "0.12.0",
+		"hard-source-webpack-plugin": "0.13.1",
 		"html-minifier": "3.5.21",
 		"http-signature": "1.2.0",
 		"insert-text-at-cursor": "0.1.1",