"Batteries included" prototool pre-commit hook

Example .pre-commit-config.yaml:

# See https://pre-commit.com.
repos:
  - repo: https://github.com/fiveai/pre-commit-prototool
    rev: master
    hooks:
      - id: "prototool:1.10.0"
        name: prototool lint
        args: ["lint"]

Links:

• https://github.com/uber/prototool
• https://pre-commit.com