0.9.1 register

[JeffFessler]

@JuliaRegistrator register()

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/8211

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 v0.9.1 -m "<description of version>" 8ad90b7bf9c4f45159f2b2d26003ec6e48d8671f
git push origin v0.9.1