Question: As OpenAPI released new 3.0 version and wso2 provides the swagger editor and ui (2.0 version). is there any time when wso2 starts supporting open api(swagger)3.0

Answer: 
It will most probably come in the next major release, APIM 3.0.0. Track the progress [here](https://github.com/wso2/product-apim/issues/1568).
Newly released API Manager 2.2.0 has OAS 3.0 and 2.0 support along with the new Swagger editor and Console.