Update swift.yml

Author: maxoly

.github/workflows/swift.yml

@@ -33,5 +33,20 @@ jobs:
       run: swift build -v
 
     - name: Run tests
-      run: |
-        swift test -v 
+      run: swift test --enable-code-coverage -v
+    
+    - name: Setup Xcode
+      uses: maxim-lobanov/setup-xcode@v1.4.0
+      with:
+        xcode-version: latest-stable
+
+    - name: Gather code coverage
+      run: xcrun llvm-cov export -format="lcov" .build/debug/SQLiteCloudPackageTests.xctest/Contents/MacOS/SQLiteCloudPackageTests -instr-profile .build/debug/codecov/default.profdata > coverage_report.lcov
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v2
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+        fail_ci_if_error: fail
+        files: ./coverage_report.lcov
+        verbose: true