2.4.1

Updated NMSVersion enum to support Spigot 1.9.4 and future NMS versions.

This update is required if you plan on downloading any expansions via the expansion cloud which might have version specific placeholder classes.

Affected expansions which will require you to update PlaceholderAPI for them to work on 1.9.4:
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These expansion updates for 1.9.4 have already been pushed to the expansion cloud. Make sure you update PlaceholderAPI before downloading as they will not register on PlaceholderAPI 2.4.0 or lower due to the NMS version for 1.9.4 being unknown in those earlier versions!