##enviroment
Xcode verison : 12.2
swift version : 4.2 or above
##guideline ###about github api request/response view
###about history
current response
other response
##about request
- request support queue requests,data parse in background thread
- response will backstore in sandbox,it can be found in memory,if no will get from disk,if no will get from github remote server.
- API response model GithubAPIResponse is business layer data model, GithubAPI is view layer data model,GithubAPI for UI.
- refactor with VIPER
- add more comments
- add more unit test