fix: upgrade css-loader from 3.4.2 to 3.5.1

Snyk has created this PR to upgrade css-loader from 3.4.2 to 3.5.1.

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

@@ -32,7 +32,7 @@
     "@freaktechnik/eslint-config-babel": "^7.1.0",
     "@freaktechnik/eslint-config-vue": "^7.1.0",
     "babel-loader": "^8.1.0",
-    "css-loader": "^3.4.2",
+    "css-loader": "^3.5.1",
     "eclint": "^2.8.1",
     "eslint": "^6.8.0",
     "file-loader": "^5.1.0",