Add Mockbin to API mocking (#55)

Co-authored-by: Stanislav Deviatov <[email protected]>

README.md

@@ -135,6 +135,7 @@ System integration is the process of linking together different IT systems (com
   - [Imposter (⭐366)](https://github.com/outofcoffee/imposter) - Mock server for REST APIs, OpenAPI (and Swagger) specifications, SOAP web services (and WSDL files), Salesforce and HBase APIs.
   - [Microcks (⭐1.3k)](https://github.com/microcks/microcks) - Open-source Kubernetes-native tool for API mocking and testing, supporting AsyncAPI, OpenAPI, Postman Collections, etc.
   - [Mockable](https://www.mockable.io/) - Simple configurable service to mock out RESTful API or SOAP web-services.
+  - [Mockbin (⭐86)](https://github.com/zuplo/mockbin) - Easily generate custom endpoints to test HTTP requests, and view the request logs from that API for free.
   - [Mockoon (⭐6.4k)](https://github.com/mockoon/mockoon) - Easy-to-use tool for designing and running mock REST APIs.
   - [MockServer (⭐4.5k)](https://github.com/mock-server/mockserver) - Easy mocking of any system you integrate with via HTTP or HTTPS.
   - [Mocky (⭐2k)](https://github.com/MockyAbstract/Mocky) - Free and unlimited online service for generating custom HTTP responses.