v0.3.0

• Add support for modals
• Add support for attachment options
• Return error messages and stack traces to Discord during development
• Add support for Bot token authentication to call()
• Fallback to partial { id } objects for mentionables, channels, and attachments on autocomplete. Closes issue #1, thanks @helloimalastair.
• Throw clearer error when useDescription("...") isn't called. Closes issue #2, thanks @SkyfallWasTaken.