Integrate CIrcle-CI 2.0 to the project

jogendra

**Actual Behaviour** Currently, no any hook for checking PR quality and testing. **Expected Behaviour** Integrate Circle-CI **Steps to reproduce it** **Screenshots of the issue** N/A **Would you like to work on the issue?** Yes

damien-rivet

Hi @jogendra, I'll gladly work on it, any particular reason for **CircleCI** ? Would **TravisCI** do the job too ? After choosing the CI, I should be able to add a coverage report with CodeCov.