v1.3.0

Features

• Configurable boolean and iterable negative prefixes. Defaults are --no- and --empty-, respectively. by @BrianPugh in #38
• Support multiple validators for each Parameter. by @BrianPugh in #43
• Allow specified App.version to be a callable. by @BrianPugh in #44

Full Changelog: v1.2.0...v1.3.0