Fix platformVersion regex to accept a patch version.
Fix platformVersion regex to accept a patch version.

billCTG/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,apascual/braintree_ios,apascual/braintree_ios,braintree/braintree_ios,apascual/braintree_ios,billCTG/braintree_ios,apascual/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios