This version will work with both 1.12.2 and 1.13 -- I haven't tested extensively, but very basic attempt hasn't shown anything wrong.

• Added smoothsleep.ignore permission that will allow players to bypass being counted as awake without needing another plugin to mark them as sleep ignored.
• Added metrics. If you don't want to use the metrics on your server, set enable-metrics: false in the config or use /ssmetrics to toggle it.
• Replaced several instances of iterating over Map keySets with entrySets to prevent doing several map look-ups for loop.