bump to v0.16.0

Author: joelhawksley

rubocop-github.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |s|
   s.name = "rubocop-github"
-  s.version = "0.15.0"
+  s.version = "0.16.0"
   s.summary = "RuboCop GitHub"
   s.description = "Code style checking for GitHub Ruby repositories "
   s.homepage = "https://github.com/github/rubocop-github"