🐛 Codecov reject any coverage drop (#8065)

Codecov reject any coverage drop

Instead of failing every PR, check for coverage drop. In this way, the coverage can only raise naturally.

Author: cardil

.codecov.yaml

@@ -4,8 +4,9 @@ coverage:
   status:
     project:
       default:
-        target: 80
-        threshold: 1%
+        # Reject the coverage drop
+        target: auto
+        threshold: 0%
     patch:
       # Disable the coverage threshold of the patch, so that PRs are
       # only failing because of overall project coverage threshold.