v6.1.0

• Feature: Prune intervals are now by default randomized between 50% and 150% of the set prune value, making the average prune interval be the same as before, but makes database load more even by making it unlikely for eg. many instances to all prune at once.
• Feature: New option pruneSessionRandomizedInterval enables deactivation + customization of the new random prune interval feature.
• Change: Default prune interval is now 5 minutes, rather than 1 minute. No need to clean extremely often. Will probably make even longer eventually, but a more drastic change could be kind of a breaking change. Please comment in #162 with feedback on future default.
• Performance: The database schema definition now specifies an index on the expire column. You have to add this yourself if you have already set up this module. The change is purely for enhancing performance and can be skipped if no performance issues have been experiences. It is recommended to apply it though.

v6.0.1...v6.1.0