Bump vue-loader from 15.9.1 to 15.9.6

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 15.9.1 to 15.9.6.
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/master/CHANGELOG.md)
- [Commits](vuejs/vue-loader@v15.9.1...v15.9.6)

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

package.json

@@ -53,7 +53,7 @@
     "css-loader": "^3.4.2",
     "file-loader": "^5.1.0",
     "url-loader": "^3.0.0",
-    "vue-loader": "^15.9.1",
+    "vue-loader": "^15.9.6",
     "vue-style-loader": "^4.1.2",
     "webpack": "^4.46.0",
     "webpack-cli": "^3.3.11",