Release 0.2.3

[tkf]

@JuliaRegistrator register(branch=release)

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/7886

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 Julia TagBot is installed, or can be done manually through the github interface, or via:

git tag -a v0.2.3 -m "<description of version>" ffa022db35fd86d02ec7a7115c6d33b54a271427
git push origin v0.2.3