Add codecov.yml allowing coverage to drop slightly before "failing"

TheBlueMatt · TheBlueMatt · commit 7cda36e26a1c · 2021-03-08T12:59:03.000-05:00
This should remove one big red X in our builds, making it harder
to miss other failing tests.
diff --git a/codecov.yml b/codecov.yml
@@ -0,0 +1,8 @@
+coverage:
+  status:
+    project:
+      default:
+        target: auto
+        threshold: 2%
+        base: auto
+        informational: false
