Fixed pod version conflict.

Author: Catacola

Wit.podspec

@@ -1,13 +1,13 @@
 Pod::Spec.new do |s|
   s.name         = "Wit"
-  s.version      = "3.1.0"
+  s.version      = "3.1.1"
   s.summary      = "Wit.AI Official SDK"
   s.description  = <<-DESC
                      Official Wit SDK, https://wit.ai/docs/ios-tutorial/
                    DESC
   s.homepage     = "https://github.com/wit-ai/wit-ios-sdk"
   s.author       = { "Willy Blandin" => "[email protected]" }
-  s.source       = { :git => "https://github.com/wit-ai/wit-ios-sdk.git", :tag => "3.1.0" }
+  s.source       = { :git => "https://github.com/wit-ai/wit-ios-sdk.git", :tag => "3.1.1" }
 
   s.platform = :ios, '6.0'
   s.ios.deployment_target = "6.0"