Release of V0.2.1

[Kexin1]

@JuliaRegistrator register

[JuliaRegistrator]

Error while trying to register: "Tag with name v0.2.0 already exists and points to a different commit"

[Kexin1]

@JuliaRegistrator register

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/92654

After the above pull request is merged, it is recommended that a tag is created on this repository for the registered package version.

This will be done automatically if the Julia TagBot GitHub Action is installed, or can be done manually through the github interface, or via:

git tag -a v0.2.1 -m "<description of version>" 750528d49e0220846ccd76e2cbd3b753986d3b5f
git push origin v0.2.1