v3.0.0-alpha9.3

What's Changed

• Feature:(issue_1927) Add ability for before handler to return new context by @dearchap in #1994
• Fix:(issue_1921) Dont display [command] in help by @dearchap in #2000
• Fix:(issue_1069) Dont show [arguments] in usage when there are no arguments defined by @dearchap in #2001
• improve output of build.go#downloadFile when download fails by @bartekpacia in #2003
• Revert GetValue() removal by @dearchap in #2004
• Re-add generic flag back by @dearchap in #2005

Full Changelog: v3.0.0-alpha9.2...v3.0.0-alpha9.3