Version 1.4.2

• [New] Add default panic handler for action()

Version 1.4.1

• [Update] Add EnvVar into help
• [Fix] EnvVar is high priority than DefValue

Version 1.4.0

• [Changes] Remove app.FlagsAlign, now it is set automatically

Version 1.3.2

• Trim space of examples in help

Version 1.3.1

• [修复] OnCommandNotFound 无法被调用

Version 1.3.0

New app.FlagsAlign to align flag labels in usage help, default is true

Version 1.2.0

Add new types as Flag.Value

• *url.URL
• *[]url.URL
• *time.Time
• *time.Location

Version 1.1.0

• fix typo placeholder

Version 1.0.0

• Support command/sub-commands.
• Support short, long alias flags
• Suport flag value bind
• Generate help and version