[Gemspec] Bump Xcodeproj to `'1.0.0.beta.4'`

Gemfile.lock

@@ -24,10 +24,10 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Xcodeproj.git
-  revision: e3ba66acbfc8a639c2286ebf888a14570d804016
+  revision: 51f06149fc109d8e8127888c2835e7e6feec16c7
   branch: master
   specs:
-    xcodeproj (1.0.0.beta.3)
+    xcodeproj (1.0.0.beta.4)
       activesupport (>= 3)
       claide (>= 1.0.0.beta.1, < 2.0)
       colored (~> 1.2)
@@ -110,7 +110,7 @@ PATH
       fourflusher (~> 0.3.0)
       molinillo (~> 0.4.4)
       nap (~> 1.0)
-      xcodeproj (>= 1.0.0.beta.3, < 2.0)
+      xcodeproj (= 1.0.0.beta.4)
 
 GEM
   remote: https://rubygems.org/

cocoapods.gemspec

@@ -38,7 +38,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'cocoapods-trunk',       '1.0.0.beta.3'
   s.add_runtime_dependency 'cocoapods-try',         '>= 1.0.0.beta.3', '< 2.0'
   s.add_runtime_dependency 'molinillo',             '~> 0.4.4'
-  s.add_runtime_dependency 'xcodeproj',             '>= 1.0.0.beta.3', '< 2.0'
+  s.add_runtime_dependency 'xcodeproj',             '1.0.0.beta.4'
 
   s.add_runtime_dependency 'activesupport', '>= 4.0.2'
   s.add_runtime_dependency 'colored',       '~> 1.2'