Allow pre-commit to autoupdate prs

[justinGilmer]

PR Summary:

Previously, when we introduced pre-commit, it required users to manually run the pre-commit hook locally.

Now, these pre-commit features can be run in the cloud now, which can be useful for users that might not want to install the required packages. This introduces the yaml configuration necessary to autoformat PRs according to our current configuration.

PR Checklist

---

• [x] Includes appropriate unit test(s)
• [x] Appropriate docstring(s) are added/updated
• [x] Code is (approximately) PEP8 compliant
• [x] Issue(s) raised/addressed?

[codecov[bot]]

Codecov Report

Merging #425 (c366ae4) into master (17576a2) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #425   +/-   ##
=======================================
  Coverage   73.59%   73.59%           
=======================================
  Files          17       17           
  Lines        1803     1803           
=======================================
  Hits         1327     1327           
  Misses        476      476