Fix coverage workflow and start using Codecov

Author: dabroek

.github/workflows/run-coverage.yml

@@ -9,23 +9,25 @@ jobs:
 
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        node-version: [16.x, 18.x]
-
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
-        with:
-          fetch-depth: 2
 
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 18.x
+
+      - name: Start Redis ${{ matrix.redis-version }}
+        uses: supercharge/redis-github-action@1.4.0
+        with:
+          redis-version: 6
 
       - name: Install dependencies
         run: npm install
 
       - name: Run the tests
         run: npm test -- --coverage
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3