v0.5.0

Breaking Changes

adjust generated name by @sigoden in #14

This only affect parameter with number suffix.

In prev version, generate names:

value name: --opt1 => OPT_1
variable name: --opt1 => argc_opt_1
cmd name: cmd1 => cmd_1

In this version, generated names:

value name: --opt1 => OPT1
variable name: --opt1 => argc_opt1
cmd name: cmd1 => cmd1

Full Changelog: v0.4.0...v0.5.0