Add amazing as a maturity level
Per this slack conversation https://gitlab.slack.com/archives/C0NFPSFA8/p1547153266219800?thread_ts=1547136721.207500&cid=C0NFPSFA8, add Amazing
/cc @markpundsack @sytses
Per this slack conversation https://gitlab.slack.com/archives/C0NFPSFA8/p1547153266219800?thread_ts=1547136721.207500&cid=C0NFPSFA8, add Amazing
/cc @markpundsack @sytses