ci(coverage): add coverage reports via CodeClimate

.github/workflows/ci.yml

@@ -32,6 +32,32 @@ jobs:
       - name: Check if mods are tidy
         run: make check-tidy
 
+  cov:
+    name: Coverage
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.15
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+      - name: Publish coverage
+        uses: paambaati/codeclimate-action@v2.7.4
+        env:
+          VERBOSE: "true"
+          GOMAXPROCS: 4
+          CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+        with:
+          coverageCommand: make cov
+          prefix: github.com/${{ github.repository }}
+          coverageLocations: |
+            ${{ github.workspace }}/coverage.out:gocov
+
   test:
     name: Test
     strategy: