Add in linting

[nervewax]

Prettier & Husky & lint-staged
https://prettier.io/docs/en/precommit.html
https://prettier.io/docs/en/watching-files.html
https://github.com/typicode/husky

Config for prettier

module.exports = {
    printWidth: 80,
    useTabs: true,
    trailingComma: 'all',
    tabWidth: 2,
    semi: true,
    singleQuote: true,
    bracketSpacing: true,
    jsxBracketSameLine: false,
    endOfLine: 'lf|crlf|cr',
};