Update test_utils.py

V2 (#16)

* Update v2.0.0

* fix test

Implement retry (#13)

* Implement retry

* Update supported python versions

* Drop support for Python3.6

* Lint max col

* Linter complient

* Update version and README

Add the json parameter for post requests: (#10)

* Add the json parameter for post requests:
The purpose here is to be iso "requests" in order
to accept empty json body.

Some "black" formatting too.

* change flake8 max line length (100 -> 120)

Add js_scenario param (#9)

Update __version__.py

Overwrite default requests user-agent (#7)

* Overwrite default requests user-agent

Update setup.py