Replace URIParser with URIs

[jmkuhn]

The README for URIParser indicates that it is deprecated in favor of URIs. Should we change the dependency for this package? This would be a breaking change so if we are going to make the change it should be before tagging 1.0. I could submit a PR if you agree that this should be done.

[rofinn]

Yes, a PR would be appreciated :) Scanning the docs it looks pretty similar, so updating the code here shouldn't be too difficult. Since we support 3rd party packages like that with Requires.jl we could probably support both package for a deprecation cycle and throw a depwarn when loading the URIParser glue code.