Bump vue-loader from 15.9.6 to 15.9.7

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 15.9.6 to 15.9.7.
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/master/CHANGELOG.md)
- [Commits](vuejs/vue-loader@v15.9.6...v15.9.7)

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

package.json

@@ -57,7 +57,7 @@
     "stylelint-config-recommended-scss": "^4.2.0",
     "stylelint-scss": "^3.19.0",
     "stylelint-webpack-plugin": "^2.1.1",
-    "vue-loader": "^15.9.6",
+    "vue-loader": "^15.9.7",
     "vue-template-compiler": "^2.6.12",
     "webpack": "^4.46.0",
     "webpack-cli": "^4.4.0",