Update or let someone else maintain this repo

[byzent]

This is the most used repository you have on github but you haven't upgraded it in 3 years.
There are PRs that have been open for over 6 years. This was a cool project but it looks like you have abandoned it.
If you don't have the time, give the reins to someone else.

[mikescholl-sysdig]

@byzent not to shill; but the sysdig team has been maintaining a forked version of this over at https://github.com/sysdiglabs/grok_exporter. The team would love community feedback there. We also host a containerized version @ https://quay.io/repository/sysdig/grok-exporter

[StyXman]

@mikescholl-sysdig I notice sysdig's fork does not have issues or discussions enabled, so we can only contact you here. How are we supposed to give you the feedback you would love to have?

I also notice you did a release on March 01st, but you have more commits since. Any plans for a new release?