Update code formatting tools

[macklinu]

#91 introduced an ESLint config to validate the ESLint rules, and as a result, this codebase now uses Standard (formatting and linting) as well as ESLint (linting).

#91 (comment) makes a good point that Standard is ESLint under the hood, so some options I see moving forward:

• update the ESLint config to extend eslint-config-standard and stop executing the standard CLI tool altogether
• migrate to Prettier for code formatting, and use ESLint strictly for code linting

As a personal preference and having more experience with Prettier, I would choose the latter. I prefer having a file formatted the same way across IDEs and computers, either by saving a file or formatting in a precommit hook - standard doesn't necessarily enforce consistent line length and bracket spacing, from my experience.

Either way, part of resolving this issue would be to introduce lint-staged into the codebase, so that code formatting and linting would run as a precommit hook.

I will leave this open for a bit in case other contributors/maintainers have anything to add.

[xjamundx]

Yeah I love prettier