This a release bring pretty big changes, but i think It doesn't need major version change.

NOT backwards compatible! DO NOT UPGRADE WORLDS FROM 2.1.x

Added :

• Creeper Overhaul
• Supplementaries
• Moyai
• Moonlight lib
• Comforts
• Elytra Slot

Changed :

• Backpacks ---> Pack It Up!
• Geophilic --->Tectonic
• Inventory Totem ---> Charm of Undying
• Companion ---> Project: Save the Pets!
• Updated Quilt Loader to 0.18.5
• Other general mod updates

Removed :

• Promenade
• Continents
• Amplified Nether
• Trash Slot
• Promenade
• Dawn API
• Ultris
• Trinkets Curios Theme