Added ReceitaWS for CNPJ consultation in Brazil (#2)

Adicionado ReceitaWS para consulta de CNPJ no Brasil
Co-authored-by: Alexandre Previatti <previatti@planetinternet.com.br>

README.md

@@ -730,6 +730,7 @@ API | Description | Auth | HTTPS | CORS |
 | [BCLaws](http://www.bclaws.ca/civix/template/complete/api/index.html) | Access to the laws of British Columbia | No | No | Unknown |
 | [Brazil](https://brasilapi.com.br/) | Community driven API for Brazil Public Data | No | Yes | Yes |
 | [Brazil Central Bank Open Data](https://dadosabertos.bcb.gov.br/) | Brazil Central Bank Open Data | No | Yes | Unknown |
+| [Brazil Receita WS](https://www.receitaws.com.br/) | Consult companies by CNPJ for Brazilian companies | No | Yes | Unknown |
 | [Brazilian Chamber of Deputies Open Data](https://dadosabertos.camara.leg.br/swagger/api.html) | Provides legislative information in Apis XML and JSON, as well as files in various formats | No | Yes | No |
 | [BusinessUSA](https://business.usa.gov/developer) | Authoritative information on U.S. programs, events, services and more | `apiKey` | Yes | Unknown |
 | [Census.gov](https://www.census.gov/data/developers/data-sets.html) | The US Census Bureau provides various APIs and data sets on demographics and businesses | No | Yes | Unknown |