ci: add codecov.yaml

.github/.codecov.yml

@@ -0,0 +1,27 @@
+# To validate:
+#   cat codecov.yml | curl --data-binary @- https://codecov.io/validate
+
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 0%
+        informational: true
+    patch:
+      default:
+        enabled: no
+        if_not_found: success
+
+comment:
+  layout: "reach, diff, files, flags"
+  behavior: default
+  require_changes: no