Add amber (Crystal) and re-enable lucky (Crystal)

This release includes following pull requests

• Re-enable flask (Thanks @waghanza 🎉)
• Missing 'n'(Thanks @waghanza 🎉)
• Dynamic calculation of benchmarking threads (Thanks @waghanza 🎉)
• Add amber (Thanks @waghanza 🎉)
• Git cleaning (Thanks @waghanza 🎉)
• Re-enable lucky (Thanks @waghanza 🎉)
• Avoid versioning npm locks (Thanks @waghanza 🎉)

So all pull requests are created by @waghanza, really great jobs! 👍