Bump the Version constants to align with the *next* release rather than the previous release.

This allows people tracking non-release gems or git submodules to use the constants.

actionmailer/lib/action_mailer/version.rb

 module ActionMailer
   module VERSION #:nodoc:
     MAJOR = 2
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].join('.')

actionpack/lib/action_pack/version.rb

 module ActionPack #:nodoc:
   module VERSION #:nodoc:
     MAJOR = 2
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].join('.')

activerecord/lib/active_record/version.rb

 module ActiveRecord
   module VERSION #:nodoc:
     MAJOR = 2
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].join('.')

activesupport/lib/active_support/version.rb

 module ActiveSupport
   module VERSION #:nodoc:
     MAJOR = 2
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].join('.')

railties/lib/rails/version.rb

 module Rails
   module VERSION #:nodoc:
     MAJOR = 2
-    MINOR = 1
+    MINOR = 2
     TINY  = 0
 
     STRING = [MAJOR, MINOR, TINY].join('.')