add cyril back to authors

Author: stevecrozz

errbit_github_plugin.gemspec

@@ -6,8 +6,9 @@ require 'errbit_github_plugin/version'
 Gem::Specification.new do |spec|
   spec.name          = "errbit_github_plugin"
   spec.version       = ErrbitGithubPlugin::VERSION
-  spec.authors       = ["Stephen Crosby"]
-  spec.email         = ["stevecrozz@gmail.com"]
+  spec.authors       = ["Stephen Crosby", "Cyril Mougel"]
+  spec.email         = ["stevecrozz@gmail.com", "cyril.mougel@gmail.com"]
+
   spec.description   = %q{GitHub integration for Errbit}
   spec.summary       = %q{GitHub integration for Errbit}
   spec.homepage      = "https://github.com/brandedcrate/errbit_github_plugin"