Bump version to 1.2.2

ebin/oauth.app

@@ -1,6 +1,6 @@
 {application, oauth, [
   {description, "An Erlang OAuth 1.0 implementation"},
-  {vsn, "1.2.1"},
+  {vsn, "1.2.2"},
   {modules, [oauth]},
   {registered, []},
   {applications, [kernel, stdlib, crypto, public_key, inets]}