0.9.0

• Added short descriptions to commands
• Added cli name for usage in themes
• Added event-based themes
• Added ability to not add handlers to command with subcommands (command help is called for command in such case)
• Changed commands' metaInfo to metadata, removed type restriction
• Fixed test function incorrectly parsing some argument strings
• Fixed .max() incorrectly comparing value with value provided by .min
• Fixed number options getting parsed into strings
• Fixed inconsistencies in default error messages
• Fixed positional enums
• Fixed enums excluding undefined from type even when they're optional
• Expanded tests
• Updated docs