fix: upgrade vue-loader from 15.9.0 to 15.9.1

Snyk has created this PR to upgrade vue-loader from 15.9.0 to 15.9.1.

See this package in NPM:
https://www.npmjs.com/package/vue-loader

See this project in Snyk:
https://app.snyk.io/org/freaktechnik/project/8e9970a9-74f3-4d0c-9562-c18e50c9d466?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -38,7 +38,7 @@
     "file-loader": "^5.1.0",
     "mini-css-extract-plugin": "^0.9.0",
     "semantic-ui-css": "^2.4.1",
-    "vue-loader": "^15.9.0",
+    "vue-loader": "^15.9.1",
     "vue-style-loader": "^4.1.2",
     "vue-template-compiler": "^2.6.11",
     "webpack": "^4.42.1",