Update podspec

Author: ra1028

DifferenceKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name = 'DifferenceKit'
-  spec.version  = '1.1.0'
+  spec.version  = '1.1.1'
   spec.author = { 'ra1028' => '[email protected]' }
   spec.homepage = 'https://github.com/ra1028/DifferenceKit'
   spec.documentation_url = 'https://ra1028.github.io/DifferenceKit'