chore: use codecov action

Author: mnightingale

.github/workflows/main.yml

@@ -38,10 +38,10 @@ jobs:
         env:
           CI: true
 
-      - name: Test Coverage
-        run: codecov -f coverage/lcov.info
-        env:
-          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v2
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Release
         if: github.ref == 'refs/heads/master'