Alpha-order gemspec dependencies

Author: film42

protobuf.gemspec

@@ -24,14 +24,14 @@ require "protobuf/version"
   s.add_dependency 'thor'
   s.add_dependency 'thread_safe'
 
+  s.add_development_dependency 'benchmark-ips'
   s.add_development_dependency 'ffi-rzmq'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec', '>= 3.0'
   s.add_development_dependency 'rubocop', '0.34.2'
   s.add_development_dependency 'simplecov'
   s.add_development_dependency 'timecop'
   s.add_development_dependency 'yard'
-  s.add_development_dependency 'benchmark-ips'
 
   # debuggers only work in MRI
   if RUBY_ENGINE.to_sym == :ruby