Add Skunk (#1711)

Author: aliariff

data/tools/skunk.yml

@@ -0,0 +1,13 @@
+name: Skunk
+categories:
+ - linter
+tags:
+ - ruby
+ - rails
+license: MIT License
+types:
+ - cli
+source: "https://github.com/fastruby/skunk"
+homepage: "https://github.com/fastruby/skunk"
+description: >-
+ A SkunkScore Calculator for Ruby Code -- Find the most complicated code without test coverage!