Put codecov in informational mode (#243)

## What

Put codecov in informational mode

## Why

it will never fail CI as it is annoying to create configuration that
will never trigger false alarm, but we still get report.

Author: llugin

codecov.yml

@@ -2,4 +2,7 @@ coverage:
   status:
     project:
       default:
-        threshold: 0.5%
+        informational: true
+    patch:
+      default:
+        informational: true