chore(ci): add coverage report action

.github/workflows/coverage.yml

@@ -0,0 +1,25 @@
+name: SASjs Adapter Coverage Report
+
+on:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install Dependencies
+        run: npm ci
+      - name: Generate coverage report
+        uses: artiomtr/jest-coverage-report-action@v2.0-rc.2
+              with:
+                  github-token: ${{ secrets.GITHUB_TOKEN }}