Default name conflicts with github.com/prometheus/client_golang/prometheus/promhttp

[mhansen]

Hi, this looks like a cool package! I've imported it and using it. One piece of feedback is that the name conflicts with the commonly used promhttp package, so people who use both have to rename one of the packages.

I certainly don't expect you to rename this package (that would be way too much to ask), but just leaving this as feedback in case you ever do a v2 :-)