Update .codeclimate.yml

Author: smuellner

.codeclimate.yml

@@ -9,6 +9,9 @@ engines:
     config:
       languages:
        - swift
+plugins:
+  swiftlint:
+    enabled: true
 fixme:
     enabled: true
 ratings:
@@ -17,4 +20,4 @@ ratings:
 exclude_paths:
 - LICENSE
 - README.md
-- MultiUser.podspec
+- MultiUser.podspec