Add codeclimate

Author: d4be4st

.codeclimate.yml

@@ -0,0 +1,16 @@
+---
+engines:
+  duplication:
+    enabled: true
+    config:
+      languages:
+        - ruby
+  fixme:
+    enabled: true
+  rubocop:
+    enabled: true
+ratings:
+  paths:
+    - "**.rb"
+exclude_paths:
+  - spec/