Multiple default handlers

Reproduction

func cannot choose between multiple fallback methods:

src/build.command.ts

import { CommandMajor, Container, Handler } from 'func'

@CommandMajor()
class BuildCommand {
  @Handler()
  build() {}

  @Handler()
  rebuild() {}
}

new Container([BuildCommand])

How to fix it

Keep one default handler and give every additional handler a flag or path:

src/build.command.ts

@CommandMajor()
class BuildCommand {
  @Handler()
  build() {}

  @Handler({ flag: 'rebuild' })
  rebuild() {}
}

new Container([BuildCommand])