codecov: update config

codecov.yml

@@ -1,2 +1,12 @@
 comment: false
-github_checks: false
+
+coverage:
+  status:
+    project:  # settings affecting project coverage
+      default:
+        target: auto  # auto % coverage target
+        threshold: 5%  # allow for 5% reduction of coverage without failing
+    patch: off
+
+github_checks:
+  annotations: false