Add pre commit metadata

[multimeric]

Closes #308.

This is really dead simple, but I've tested it on a repo and it works great. I use no args by default to ensure users can customize everything by adding flags.

Here's an example .pre-commit-config.yaml you can use to test my fork on another repo:

repos:
  - repo: https://github.com/multimeric/FawltyDeps
    rev: e47521ef
    hooks:
      - id: check
        args:
          - --detailed

[jherland]

I checked this against the documentation on https://pre-commit.com and ran it without problems in a local repo. Looks all good to me! 🚀

Thanks for your contribution @multimeric!