Register v0.10.3

[kahaaga]

@JuliaRegistrator register

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/5573

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 v0.10.3 -m "<description of version>" 3fad919a7132242abe3d44cd494383f050973697
git push origin v0.10.3