You will need to update your configs for this version! See below for instructions.

Terra v3.0 is finally here, after almost a month and a half of hard work!
3.0 is by far the largest update Terra has ever seen (over 25,000 lines of diff)! This update adds several insane new features:

• Platform-Agnostic Engine
  Terra no longer depends on an implementation of Minecraft. We have a completed Bukkit implementation and mostly finished Fabric and standalone implementations. We plan to do a Sponge implementation as well once we finish up Fabric and standalone. This also removes dependency on Gaea.
  
• TerraScript
  TerraScript is our custom scripting engine, designed for the creation of custom procedurally generated structures. In the 3.0 default, we use TerraScript to generate procedural villages and mineshafts, as well as procedurally generated trees. You can convert your old structures to TerraScript very easily with our conversion tool.

Default config changes:

• Procedurally generated trees
  Using TerraScript, Oak and Spruce trees are procedurally generated now!
• Villages
  Procedurally generated TerraScript villages have finally been added. Structures made by @_DeathShade_
  
• Mineshafts
  Procedurally generated Mineshafts
• Ruined Portals
  Ruined portals were added. PR by @solonovamax

You will need to update your configs for this version!
If you are using the default config, simply delete Terra's packs and lang folders. Note that parity with old configs is broken.

If you are using a custom config, delete the lang folder, update your structures with the conversion tool, and update your structure configs to the new format, described on the wiki.