v3.0.0-alpha7

What's Changed

• Fix:(issue_1826) Make IsSet work with persistent flags by @dearchap in #1827
• Chore:(v3_docs) Initial rev for v3 docs by @dearchap in #1828
• Docs: Add link to v3 by @dearchap in #1832
• Feat:(issue_1074) Add basic support for cmd args by @dearchap in #1833
• Fix:(issue_1720) Add support for reading args from stdin by @dearchap in #1836
• Fix:(issue_1834) Add check for persistent required flags by @dearchap in #1835

Full Changelog: v3.0.0-alpha6...v3.0.0-alpha7