try to fix stylelint for github actions

Author: alexandermeindl

Diff for: .github/workflows/stylelint.yml

@@ -9,6 +9,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - uses: actions-hub/stylelint@master
-      env:
-          PATTERN: "assets/stylesheets/*.css"
+    - uses: actions/setup-node@v2
+      with:
+        node-version: '14'
+    - run: yarn install
+    - run: node_modules/.bin/stylelint "assets/stylesheets/*.css"

Diff for: package.json

@@ -0,0 +1,7 @@
+{
+  "dependencies": {},
+  "devDependencies": {
+    "eslint": "^7.0.0",
+    "stylelint": "^13.0.0"
+  }
+}