Introduce commit message linting

[BeardOfDoom]

Brief

Once you start linting your code, there's no way back: you want to lint everything! For example, commit messages. Enforcing format and structure in commit messages allows for automatic semver bumps, changelog generation, repository analytics, and also looks good. See https://www.conventionalcommits.org/en/v1.0.0/

Because cryptid-js lacks this facility, we should definitely add commitlinting.

Task

• Add commit message linting using https://github.com/conventional-changelog/commitlint/tree/master/@commitlint/config-conventional and https://github.com/typicode/husky