argparse

package main

import (
	"fmt"
	"github.com/akamensky/argparse"
	"os"
)

func main() {
   parser := argparse.NewParser("accounts", "Prints provided string to stdout")
   noTest := parser.Flag("n", "no-test", &argparse.Options{Help: "boolean true/false", Default: true})

   err := parser.Parse(os.Args)
   if err != nil {
      fmt.Print(parser.Usage(err))
   }
   fmt.Println(*no

Is your feature request related to a problem? Please describe.
'choices' does not seem to be checked in load() method and invalid value can be set via the method.

To reproduce:

config.yml

animal: bird

argtest.py

import dataclasses
import simple_parsing as sp
from simple_parsing.helpers import Serializable

@dataclasses.dataclass
class Config(Serializabl