Merge pull request #484 from djchen/fitbit

Add Fitbit provider to readme

Author: ramsey

README.PROVIDERS.md

@@ -42,6 +42,7 @@ Gateway | Composer Package | Maintainer
 [Envato](https://github.com/dilab/envato-oauth2-provider) | dilab/envato-oauth2-provider | [Xu Ding](https://github.com/dilab)
 [Eventbrite](https://github.com/stevenmaguire/oauth2-eventbrite) | stevenmaguire/oauth2-eventbrite | [Steven Maguire](https://github.com/stevenmaguire)
 [Eve Online](https://github.com/EvELabs/oauth2-eveonline) | evelabs/oauth2-eveonline | [Oleg Krasavin](https://github.com/okwinza)
+[Fitbit](https://github.com/djchen/oauth2-fitbit) | djchen/oauth2-fitbit | [Dan Chen](https://github.com/djchen)
 [Foursquare](https://github.com/stevenmaguire/oauth2-foursquare) | stevenmaguire/oauth2-foursquare | [Steven Maguire](https://github.com/stevenmaguire)
 [FreeAgent](https://github.com/CloudManaged/oauth2-freeagent) | cloudmanaged/oauth2-freeagent | [Israel Sotomayor](https://github.com/zot24)
 [Google Nest](https://github.com/JC5/nest-oauth2-provider) | grumpydictator/nest-oauth2-provider | [James Cole](https://github.com/JC5)