pre-commit proposal

[codegeschrei]

Description

Pre-commit proposal. I used the same settings we have for BigchainDB. In the future, it might be good to check and switch to yapf instead of flake8. All settings are explained here. I already added all the styling changes pre-commit made because it's not that much. In this PR:

• pre-commit config
• added pre-commit to settings
• mentioned pre-commit in quickstart docs
• styling changes

Issues This PR Fixes

None

Related PRs

None

Todos

None

Deployment Notes

None

How to QA

None

Impacted Areas in Application

None

[codecov-io]

Codecov Report

Merging #349 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #349   +/-   ##
=======================================
  Coverage   99.15%   99.15%           
=======================================
  Files           9        9           
  Lines         236      236           
=======================================
  Hits          234      234           
  Misses          2        2