Register v0.13.1

[joa-quim]

@JuliaRegistrator register()

[JuliaRegistrator]

Registration pull request created: JuliaRegistries/General/7491

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 v0.13.1 -m "<description of version>" ac793783c98230b03788cd14734b76e08170e661
git push origin v0.13.1

Also, note the warning: Version 0.13.1 skips over 0.13.0
This can be safely ignored. However, if you want to fix this you can do so. Call register() again after making the fix. This will update the Pull request.