Bump vue-loader from 15.7.1 to 15.7.2 in /js

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 15.7.1 to 15.7.2.
- [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/v15.7.1...v15.7.2)

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

js/package.json

@@ -37,7 +37,7 @@
     "style-loader": "^1.0.0",
     "uglifyjs-webpack-plugin": "^2.2.0",
     "url-loader": "^2.1.0",
-    "vue-loader": "^15.7.1",
+    "vue-loader": "^15.7.2",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.10",
     "webpack": "^4.41.2",