Not really working because theme-lint is actually not really linting all the theme files as of right now, just the translation ones.
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Runs theme-lint as mocha tests.
$ npm install mocha-shopify-lint --save-dev
mochaShopifyLint(patters)
Where patterns is an array of glob patterns.
shopify-lint.spec.js
const mochaShopifyLint = require('mocha-shopify-lint')
mochaShopifyLint(['./test/files/**/*.liquid'])