[Feature Request] Possibility to select option with tab

[cork]

Feature Request

I'm trying to replace an old cli with go-prompt, in that implementation tab was used to accept options. As far as I've been able to find only way to select an option is space in go-prompt?

Something like this:

package main

import (
	"fmt"
	"os"
	"strings"

	prompt "github.com/elk-language/go-prompt"
	istrings "github.com/elk-language/go-prompt/strings"
)

func completer(in prompt.Document) ([]prompt.Suggest, istrings.RuneNumber, istrings.RuneNumber) {
	line := in.TextBeforeCursor()

	words := strings.Split(line, " ")

	if len(words) < 2 {
		endIndex := in.CurrentRuneIndex()
		startIndex := endIndex - istrings.RuneCountInString(words[0])
		return prompt.FilterHasPrefix([]prompt.Suggest{
			{"run ", "run things"},
			{"test ", "test things"},
			{"call ", "call things"},
		}, words[0], true), startIndex, endIndex
	}

	endIndex := in.CurrentRuneIndex()
	startIndex := endIndex - istrings.RuneCountInString(in.GetWordBeforeCursor())

	switch words[0] {
	case "run":
		return prompt.FilterHasPrefix([]prompt.Suggest{
			{"-b", "background"},
			{"-f", "forground"},
			{"-r", "remote"},
		}, in.GetWordBeforeCursor(), true), startIndex, endIndex
	case "test":
		return nil, 0, 0
	case "call":
		return prompt.FilterHasPrefix([]prompt.Suggest{
			{"-l", "local"},
			{"-r", "regional"},
			{"-x", "cross country"},
		}, in.GetWordBeforeCursor(), true), startIndex, endIndex
	default:
		return nil, 0, 0
	}
}

func executor(line string) {
	fmt.Println(line)
	os.Exit(0)
}

func main() {
	p := prompt.New(
		executor,
		prompt.WithPrefix("run > "),
		prompt.WithCompleter(completer),
	)
	p.Run()
}

I've tried to use WithKeyBind but it isn't called during completion. Am i missing something or isn't this supported for the moment?