Mvola

**What's changed**
- [IMP] Continuous integration with github action 6 rootkit7628
- [FIX] Phone number regex pattern 5 tbgracy
- [FEAT] Usage by environnement variables 4 gaetan1903
- [IMP] Unit testing with pytest rivo2302

FEATURES 🚀
- Add env.file to put consummer key and secret key

IMPROVEMENTS 🚀
- Documentation (Using thread to get response of Mvola API [here](https://github.com/rivo2302/Mvola/blob/8dcf1d9b93472c7825ef7b370b75cc10eab7ec36/demo.py#L69))

FIX BUG 🚀
- Fix error on status on Generate token and Status of transaction
- Format code (Black)

Link : [Pypi](https://pypi.org/project/mvola/1.0.4/)

FEATURES :star2:
- [X] Generate token
- [X] Init transaction
- [X] Documentation
- [X] Publish on pypi.org [here](https://pypi.org/project/mvola/)