removing requirements to use pipenv only

[elfosardo]

as discussed in issue #55 we should remove requirements from the picture and use pipenv only
the Pipfile and Pipfile.lock files are already configured so with this PR we're just removing the requirements structure

[liadmagen]

I think it needs the requests package. using:
pipenv install requests
will add it to the pipfile, and it will pass the integration tests

[elfosardo]

@liadmagen thanks for the suggestion, I will give it a try

[elfosardo]

@liadmagen I can see requests already in the Pipfile under packages section
looking back at the integration logs it seems like it's missing the responses package instead

[codecov]

Codecov Report

Merging #59 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #59   +/-   ##
=======================================
  Coverage   83.56%   83.56%           
=======================================
  Files          13       13           
  Lines         219      219           
  Branches       23       23           
=======================================
  Hits          183      183           
  Misses         32       32           
  Partials        4        4

[liadmagen]

Great, thanks! 👍