Bump to 1.4.0

Author: onmyway133

DeepDiff.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
   s.name             = "DeepDiff"
   s.summary          = "Diff in Swift"
-  s.version          = "1.3.0"
+  s.version          = "1.4.0"
   s.homepage         = "https://github.com/onmyway133/DeepDiff"
   s.license          = 'MIT'
   s.author           = { "Khoa Pham" => "[email protected]" }