Release 2.1.1

Fixed deployment to npmjs.com.

This version 2.1.1 of Shariff-Plus is equal to Shariff 3.1.1 plus the facebooklike service.

Note that the Google+ service has been removed due to the shutdown of Google+.
See https://developers.google.com/+/integrations-shutdown
and https://developers.google.com/+/web/+1button/:

Google+ APIs will be shut down on March 7, 2019. This includes Google+ Sign-in. Learn more.
Google+ integrations for web and mobile apps will also cease to function March 7, 2019. Learn more.
This will be a progressive shutdown, with intermittent failures starting as early as January 28, 2019.