Bump new version

[m-j-w]

@JuliaRegistrator register

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/59214

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 v0.3.1 -m "<description of version>" df5fa0b9a02914b460b91b7d34434e527b67a41c
git push origin v0.3.1