[Travis] Pin mocha to 1.0.0

Gemfile

@@ -17,7 +17,7 @@ group :development do
   gem 'cocoapods-trunk',      :git => 'https://github.com/CocoaPods/cocoapods-trunk.git', :branch => 'master'
 
   gem 'rake', '~> 10.1.0'   # Ruby 1.8.7
-  gem "mocha"
+  gem "mocha", '~> 1.0.0'   # Issues with Ruby 2.0.0 on Travis
   gem "bacon"
   gem "mocha-on-bacon"
   gem 'prettybacon'

Gemfile.lock

@@ -120,7 +120,7 @@ GEM
     metaclass (0.0.4)
     method_source (0.8.2)
     mime-types (1.25.1)
-    mocha (1.1.0)
+    mocha (1.0.0)
       metaclass (~> 0.0.1)
     mocha-on-bacon (0.2.2)
       mocha (>= 0.13.0)
@@ -184,7 +184,7 @@ DEPENDENCIES
   i18n (= 0.6.4)
   kicker
   mime-types (< 2)
-  mocha
+  mocha (~> 1.0.0)
   mocha-on-bacon
   prettybacon
   pry