Discordjs Commando Versions Save

• Fixed error in typings.
• Use is-promise to check for promises. (#321)
• Using argsPromptsLimit now gives the full format help text rather than just "Cancelled command" when the prompt limit is hit.
• Allow testing arguments against the current response message from prompting rather than the original message. (#367)
• Update sqlite example in docs. (#365)

This release corrects typing errors.