使用chalk定义输出样式：Chalk comes with an easy to use composable API where you just chain and nest the styles you want.
const chalk = require('chalk')
console.log(chalk.blue('Hello world!'))
console.log(chalk.hex('#DEADED').underline('Hello, world!'))
console.log(chalk.keyword('orange')('Some orange text'))
console.log(chalk.rgb(15, 100, 204).inverse('Hello!'))
console.log(`==========================`)
const error = chalk.bold.red;
const warning = chalk.keyword('orange');
console.log(error('Error!'));
console.log(warning('Warning!'));
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