update README

- remove limitation from README as it is not a limitation anymore :) 

- remove credits as more and more people are contributing and this project does not belong only to me and julio anymore.

README.md

@@ -145,10 +145,3 @@ To avoid the need to restart fake-server in order to clear the configuration, we
 
 ### Limitations
 - There are two reserved endpoints: POST '/add' and  `DELETE` '/flush'. These cannot be used by your application.
-- There is still no support for request headers validation. All you can do is configure the response headers. 
-
-
-### Get in touch:  
-
-* bigo ([email protected])  
-* julio ([email protected])