Setup formatting checks and follow formatting guidelines

[MrNaif2018]

This PR removes pylint because of incompatibility with isort 5 and other bugs, upgrades isort to version 5, and formats all python code with it to comply to our coding guidelines.
To run all checks before committing, it is now possible to just run make command

[codecov]

Codecov Report

Merging #11 into master will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff           @@
##           master      #11   +/-   ##
=======================================
  Coverage   62.82%   62.82%           
=======================================
  Files           9        9           
  Lines         347      347           
=======================================
  Hits          218      218           
  Misses        129      129           

Impacted Files	Coverage Δ
bitcart/coins/btc.py	54.54% <61.53%> (ø)
bitcart/coins/bch.py	68.75% <66.66%> (ø)
bitcart/providers/jsonrpcrequests.py	68.25% <66.66%> (ø)
bitcart/coin.py	83.33% <100.00%> (ø)

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