[gemspec] ActiveSupport 3.2 is not enough, bump patch level.

Fixes #1503

Gemfile.lock

 GIT
   remote: https://github.com/CocoaPods/CLAide.git
-  revision: e97c290ccc133ed03b856ca5527cfc47610ac901
+  revision: c12d8bdd0579807fd8a265cf1a0e2d8fbb36e90d
   branch: master
   specs:
     claide (0.3.2)
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: 95a4edaac972f6183e1c19e4b519f5d79e14898d
+  revision: 4769d4a3424311c6f865f8c27d6065f71d001dbe
   branch: master
   specs:
     cocoapods-core (0.26.2)
@@ -17,7 +17,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Xcodeproj.git
-  revision: 137c22774ca770e112fb8eeb2f10473db7587d16
+  revision: b45e203f4aa68653f4bf7febc4b074b2016e2acd
   branch: master
   specs:
     xcodeproj (0.13.1)
@@ -26,7 +26,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/cocoapods-downloader.git
-  revision: e1d5a83fcd4c22e2f54e4a3517c69405c5acad55
+  revision: 899f3face9d432b4084e78842776e249b77a1b8a
   branch: master
   specs:
     cocoapods-downloader (0.2.0)
@@ -51,7 +51,7 @@ PATH
   remote: .
   specs:
     cocoapods (0.26.2)
-      activesupport (~> 3.2)
+      activesupport (>= 3.2.15, < 4)
       claide (~> 0.3.2)
       cocoapods-core (= 0.26.2)
       cocoapods-downloader (~> 0.2.0)
@@ -64,7 +64,7 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (3.2.14)
+    activesupport (3.2.15)
       i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
     awesome_print (1.2.0)
@@ -82,7 +82,7 @@ GEM
     ffi (1.9.0)
     github-markup (0.7.5)
     i18n (0.6.5)
-    json (1.8.0)
+    json (1.8.1)
     listen (1.1.6)
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9)
@@ -94,7 +94,7 @@ GEM
       metaclass (~> 0.0.1)
     mocha-on-bacon (0.2.2)
       mocha (>= 0.13.0)
-    multi_json (1.8.1)
+    multi_json (1.8.2)
     nap (0.5.1)
     open4 (1.3.0)
     posix-spawn (0.3.6)
@@ -123,7 +123,7 @@ GEM
     term-ansicolor (1.2.2)
       tins (~> 0.8)
     thor (0.18.1)
-    tins (0.11.0)
+    tins (0.12.0)
     yajl-ruby (1.1.0)
     yard (0.8.7.2)
 

cocoapods.gemspec

@@ -36,7 +36,7 @@ s.add_runtime_dependency 'xcodeproj',            '~> 0.13.1'
   s.add_runtime_dependency 'escape',        '~> 0.0.4'
   s.add_runtime_dependency 'json',          '~> 1.8'
   s.add_runtime_dependency 'open4',         '~> 1.3'
-  s.add_runtime_dependency 'activesupport', '~> 3.2'
+  s.add_runtime_dependency 'activesupport', '>= 3.2.15', '< 4'
 
   s.add_development_dependency 'bacon', '~> 1.1'