Remove version restriction on rspec.

Author: jcoglan

Diff for: songkick-oauth2-provider.gemspec

@@ -21,7 +21,7 @@ spec = Gem::Specification.new do |s|
   s.add_development_dependency("activerecord", "~> 3.2.0") # The SQLite adapter in 3.1 is broken
   s.add_development_dependency("mysql", "~> 2.8.0") if ENV["DB"] == "mysql" # version locked by ActiveRecord
   s.add_development_dependency("pg") if ENV["DB"] == "postgres"
-  s.add_development_dependency("rspec", "~> 2.11.0")
+  s.add_development_dependency("rspec")
   s.add_development_dependency("sqlite3")
   s.add_development_dependency("sinatra", ">= 1.3.0")
   s.add_development_dependency("thin")