request a new release

[chenrui333]

👋 it has been two years since last release in June 2021, it is good to cut a new release (for features and dependencies refresh). Thanks!

[nchammas]

• https://github.com/nchammas/flintrock/releases/tag/v2.1.0
• https://pypi.org/project/Flintrock/2.1.0/