bump version to 0.3.1

Author: ddddxxx

CombineX.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "CombineX"
-  s.version      = "0.3.0"
+  s.version      = "0.3.1"
   s.summary      = "Open source implementation for Apple's Combine."
   s.homepage     = "https://github.com/cx-org/CombineX"
   s.license      = { :type => "MIT", :file => "LICENSE" }

README.md

@@ -30,20 +30,20 @@ Open-source implementation of Apple's [Combine](https://developer.apple.com/docu
 
 ```swift
 package.dependencies += [
-    .package(url: "https://github.com/cx-org/CombineX", from: "0.3.0"),
+    .package(url: "https://github.com/cx-org/CombineX", from: "0.3.1"),
 ]
 ```
 
 #### CocoaPods
 
 ```ruby
-pod 'CombineX', "~> 0.3.0"
+pod 'CombineX', "~> 0.3.1"
 ```
 
 #### Carthage
 
 ```carthage
-github "cx-org/CombineX" ~> 0.3.0
+github "cx-org/CombineX" ~> 0.3.1
 ```
 
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