Version bump.

Author: ashfurrow

Action.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "Action"
-  s.version      = "2.2.0"
+  s.version      = "2.2.1"
   s.summary      = "Abstracts actions to be performed in RxSwift."
   s.description  = <<-DESC
     Encapsulates an action to be performed, usually by a UIButton press.

Changelog.md

@@ -4,6 +4,11 @@ Changelog
 Current master
 --------------
 
+2.2.1
+-----
+
+- Loosens dependency on RxSwift.
+
 2.2.0
 -----