Update mocha to version 1.13.0

Author: depfu[bot]

oauth.gemspec

@@ -40,7 +40,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("iconv")
   spec.add_development_dependency("rack", "~> 2.0")
   spec.add_development_dependency("rack-test")
-  spec.add_development_dependency("mocha", ">= 0.9.12", "<=1.1.0")
+  spec.add_development_dependency("mocha", ">= 0.9.12", "<= 1.13.0")
   spec.add_development_dependency("typhoeus", ">= 0.1.13")
   spec.add_development_dependency("em-http-request", "0.2.11")
   spec.add_development_dependency("curb")