update codecov action to v2

Author: patinthehat

.github/workflows/run-tests.yml

@@ -64,7 +64,7 @@ jobs:
       run: npm run test -- --coverage --coverageReporters json
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v2
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         files: coverage/coverage-final.json