💚 Allow builds on Ruby 2.0

Signed-off-by: Peter Boling <peter.boling@gmail.com>

Author: pboling

oauth.gemspec

@@ -35,7 +35,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency("mocha")
   spec.add_development_dependency("rack", "~> 2.0")
   spec.add_development_dependency("rack-test")
-  spec.add_development_dependency("rake", "~> 13.0")
+  spec.add_development_dependency("rake", "~> 12.2")
   spec.add_development_dependency("rest-client")
   spec.add_development_dependency("typhoeus", ">= 0.1.13")
   spec.add_development_dependency("webmock", "<= 3.14.0")