add documentation on additional oembed parameters [ci skip]
add documentation on additional oembed parameters [ci skip]

widget_type and hide_tweet were recently added to Twitter's
documentation: https://dev.twitter.com/rest/reference/get/statuses/oembed

roschaefer/twitter,dantame/twitter,creeshla/ruby-twitter,mike-north/twitter,DarbySmart/twitter,SophieDeBenedetto/twitter,stkn417/twitter,kevinmel2000/twitter,megashurik/twitter,kmcmcurtis7/twitter,develon/twitter,paulgonz6/twitter,stefansundin/twitter,thomas-holmes/twitter,ariarijp/twitter