docs: adds enterprise sponsors

Author: kiwicopple

README.md

@@ -23,3 +23,11 @@ Bump the semver.
 ```sh
 npm publish --access=public
 ```
+
+
+## Sponsors
+
+We are building the features of Firebase using enterprise-grade, open source products. We support existing communities wherever possible, and if the products don’t exist we build them and open source them ourselves. Thanks to these sponsors who are making the OSS ecosystem better for everyone.
+
+[![Worklife VC](https://user-images.githubusercontent.com/10214025/90451355-34d71200-e11e-11ea-81f9-1592fd1e9146.png)](https://www.worklife.vc)
+[![New Sponsor](https://user-images.githubusercontent.com/10214025/90518111-e74bbb00-e198-11ea-8f88-c9e3c1aa4b5b.png)](https://github.com/sponsors/supabase)