chore(deps-dev): bump assets-webpack-plugin from 3.9.12 to 6.1.2

Bumps [assets-webpack-plugin](https://github.com/ztoben/assets-webpack-plugin) from 3.9.12 to 6.1.2.
- [Release notes](https://github.com/ztoben/assets-webpack-plugin/releases)
- [Changelog](https://github.com/ztoben/assets-webpack-plugin/blob/master/changelog.md)
- [Commits](https://github.com/ztoben/assets-webpack-plugin/commits/6.1.2)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -84,7 +84,7 @@
     "@webscaffold/task-css-compiler": "0.1.0-alpha.11",
     "@webscaffold/task-js-compiler": "0.1.0-alpha.7",
     "@webscaffold/task-watcher": "0.1.0-alpha.7",
-    "assets-webpack-plugin": "3.9.12",
+    "assets-webpack-plugin": "6.1.2",
     "ava": "3.8.2",
     "babel-loader": "8.1.0",
     "case-sensitive-paths-webpack-plugin": "2.3.0",