feat: default for prompt

Author: jdx

examples/prompt.ts

@@ -1,6 +1,6 @@
 import {cli} from '../src'
 
-const wait = (ms = 400) => new Promise(resolve => setTimeout(resolve, ms))
+const wait = (ms = 100) => new Promise(resolve => setTimeout(resolve, ms))
 
 async function run() {
   cli.action.start('doing a thing')
@@ -17,6 +17,9 @@ async function run() {
   cli.log(`you entered: ${input}`)
   input = await cli.prompt('your name (default)', {default: 'somedefault'})
   await wait()
+  cli.log(`you entered: ${input}`)
+  input = await cli.prompt('your name (not required)', {required: false})
+  await wait()
   cli.action.stop()
   cli.log(`you entered: ${input}`)
 }

test/prompt.test.ts

@@ -25,6 +25,6 @@ describe('prompt', () => {
       process.stdin.emit('data', '')
       const answer = await promptPromise
       await cli.done()
-      expect(answer).to.equal('')
+      expect(answer).to.equal(undefined)
   })
 })