Bump vue-loader from 15.7.0 to 15.8.3

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 15.7.0 to 15.8.3.
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-loader/compare/v15.7.0...v15.8.3)

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

package.json

@@ -55,7 +55,7 @@
     "spotify-web-api-node": "^4.0.0",
     "superagent": "^5.0.6",
     "vue": "^2.6.11",
-    "vue-loader": "^15.0.4",
+    "vue-loader": "^15.8.3",
     "vue-router": "^3.0.1",
     "vue-server-renderer": "^2.6.11",
     "vue-template-compiler": "^2.6.11",