#12 Runtime Upgrade - Enable EVM+ for Acala and other improvements

Summary

This is a runtime release for Acala and Karura that fixes transaction fee handling with vested ACA/KAR token, improve aUSD debt payback logic and enable EVM+ for Acala runtime.

Release Note: Release Acala & Karura 2.6.3 · AcalaNetwork/Acala · GitHub

Referendum