Look into Chang HF changes

With Chang a number of changes are coming, including
 
-   CIP-69/CIP-117 support for Plutus v3 scripts
-   New primitives available in Plutus v3
-   Plutus v1 reference scripts enabled
-   New reference script fees
-   New cost model settings - overall costs should be reduced for most Plutus scripts (v1, v2 and v3)
-    Governance scripts will be possible