Add Superset (#2837)

README.md

@@ -252,6 +252,7 @@ API | Description | Auth | HTTPS | CORS |
 ### Business
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
+| [Apache Superset](https://superset.apache.org/docs/rest-api) | API to manage your BI dashboards and data sources on Superset | `apiKey` | Yes | Yes |
 | [Charity Search](http://charityapi.orghunter.com/) | Non-profit charity data | `apiKey` | No | Unknown |
 | [Clearbit Logo](https://clearbit.com/docs#logo-api) | Search for company logos and embed them in your projects | `apiKey` | Yes | Unknown |
 | [Domainsdb.info](https://domainsdb.info/) | Registered Domain Names Search | No | Yes | No |