Bump beta version

Beta 1 was published from a branch so we need to bump to beta 2

Author: chipsnyder

WordPressAuthenticator.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name          = "WordPressAuthenticator"
-  s.version       = "1.40.0-beta.1"
+  s.version       = "1.40.0-beta.2"
 
   s.summary       = "WordPressAuthenticator implements an easy and elegant way to authenticate your WordPress Apps."
   s.description   = <<-DESC