Merge pull request #293 from nils-a/feature/GH-221

(#221) add a simple codecov.yml

Author: nils-a

.codecov.yml

@@ -0,0 +1,17 @@
+codecov:
+  notify:
+    require_ci_to_pass: no
+
+coverage:
+  precision: 2
+  round: down
+  range: "75...100"
+  status:
+    project:
+      default:
+        target: 80%
+        threshold: 3%
+    patch:
+      default:
+        target: 80%
+        threshold: 3%