ci: invalidate cache for testing

Author: sgratzl

.github/workflows/ci_fast.yaml

@@ -18,13 +18,13 @@ jobs:
 
       - uses: actions/setup-node@v1
         with:
-          node-version: "12"
+          node-version: "14"
       - uses: actions/cache@v2
         with:
           path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+          key: ${{ runner.os }}-node2-${{ hashFiles('**/package-lock.json') }}
           restore-keys: |
-            ${{ runner.os }}-node-
+            ${{ runner.os }}-node2-
       - run: npm ci
       - name: Lint
         run: npm run lint