Minecraft 1.15 was released on December 10, followed by 1.15.1 on December 17.

Minecraft 1.15.1 fixes a few bugs introduced in 1.15, and improves performance.

Minecraft 1.15 is considered a major upgrade from 1.14.x. From the release notes:

... added bees and bee-related items, such as beehives, honey bottles and honeycombs. Alongside adding bees, this update focused on fixing bugs and improving performance, as well as adding numerous features that were originally Bedrock Edition exclusives.

The JDRGaming Minecraft server is now running Spigot 1.15.1.