use @nextcloud/stylelint-config, update and simple

.github/workflows/lint.yml

@@ -14,6 +14,8 @@ jobs:
       uses: actions/checkout@v2
     - name: Set up Node
       uses: actions/setup-node@v2
+      with:
+        node-version: '16'
     - name: Set up Stylelint Problem Matcher
       uses: xt0rted/stylelint-problem-matcher@v1
     - name: Install Dependencies

.stylelintrc.js

@@ -1,26 +1 @@
-module.exports = {
-	extends: 'stylelint-config-recommended-scss',
-	rules: {
-		indentation: 'tab',
-		'selector-type-no-unknown': null,
-		'number-leading-zero': null,
-		'rule-empty-line-before': [
-			'always',
-			{
-				ignore: ['after-comment', 'inside-block']
-			}
-		],
-		'declaration-empty-line-before': [
-			'never',
-			{
-				ignore: ['after-declaration']
-			}
-		],
-		'comment-empty-line-before': null,
-		'selector-type-case': null,
-		'selector-list-comma-newline-after': null,
-		'no-descending-specificity': null,
-		'string-quotes': 'single'
-	},
-	plugins: ['stylelint-scss']
-}
+module.exports = require('@nextcloud/stylelint-config')