Upgrade Aruba gem dependency.

The new version requires an additional, optional, `timeout` argument.
Include this argument in the world shim.

Author: cupakromer

features/support/env.rb

@@ -1,8 +1,9 @@
 require 'aruba/cucumber'
 
 module ArubaExt
-  def run(cmd)
-    super(cmd =~ /^rspec/ ? "bin/#{cmd}" : cmd)
+  def run(cmd, timeout = nil)
+    exec_cmd = cmd =~ /^rspec/ ? "bin/#{cmd}" : cmd
+    super(exec_cmd, timeout)
   end
 end
 

rspec-rails.gemspec

@@ -40,6 +40,6 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rake',     '~> 10.0.0'
   s.add_development_dependency 'cucumber', '~> 1.3.5'
-  s.add_development_dependency 'aruba',    '~> 0.4.11'
+  s.add_development_dependency 'aruba',    '~> 0.5.4'
   s.add_development_dependency 'ammeter',  '1.0.0'
 end