Revert back to v1 codecov uploader

This reverts commit c029bae.

Author: chris48s

.github/workflows/test.yml

@@ -35,6 +35,6 @@ jobs:
         run: poetry build
 
       - name: Upload coverage report to codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v1
         with:
           file: ./coverage.xml