fix codecov yaml for 3.0

.codecov.yml

@@ -1,17 +1,11 @@
 codecov:
-  notify:
-    require_ci_to_pass: yes
+  require_ci_to_pass: yes
 
 coverage:
   precision: 2
-  round: nearest
+  round: down
   range: "70...85"
 
-  status:
-    project: yes
-    patch: yes
-    changes: no
-
 parsers:
   gcov:
     branch_detection:
@@ -21,6 +15,6 @@ parsers:
       macro: no
 
 comment:
-  layout: "header, diff"
+  layout: "reach,diff,flags,files,footer"
   behavior: default
   require_changes: no