Bump version to 1.4.0

Author: OhKanghoon

README.md

@@ -19,7 +19,7 @@
 
 - Using [CocoaPods](https://cocoapods.org)
 ```ruby
-pod 'RxApolloClient', '1.3.0'
+pod 'RxApolloClient', '1.4.0'
 ```
 - Using [Swift Package Manager]
 ```swift
@@ -28,7 +28,7 @@ import PackageDescription
 let package = Package(
   name: "YourApp",
   dependencies: [
-    .package(url: "https://github.com/OhKanghoon/RxApolloClient", from: "1.3.0")
+    .package(url: "https://github.com/OhKanghoon/RxApolloClient", from: "1.4.0")
   ]
 )
 ```

RxApolloClient.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'RxApolloClient'
-  s.version          = '1.3.0'
+  s.version          = '1.4.0'
   s.summary          = 'Rx wrapper of Apollo Client'
   s.description      = <<-DESC
   RxSwift extensions for Apollo Client