feat(update): add update command

[hkuczynski]

Description

This PR adds an update command which updates the CLI.

Usage:
very_good update

Closes: #433.

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[felangel]

Looks great we just need to update the usage tests to include the update command

[hkuczynski]

Looks great we just need to update the usage tests to include the update command

Should I do it manually or is it generated somehow?

[felangel]

Looks great we just need to update the usage tests to include the update command

Should I do it manually or is it generated somehow?

You'll need to update the command_runner_test.dart to update the expected usage. Let me know if you need any help

[hkuczynski]

@

Looks great we just need to update the usage tests to include the update command

Should I do it manually or is it generated somehow?

You'll need to update the command_runner_test.dart to update the expected usage. Let me know if you need any help

@felangel Done

[felangel]

LGTM ✅ 🎉