feat!: upgrade to [email protected] & MSRV 1.81

Co-authored-by: “ramfox” <“[email protected]”>
Co-authored-by: dignifiedquire <[email protected]>

Author: 3 people

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
       - main
 
 env:
-  MSRV: "1.63"
+  MSRV: "1.81"
   RUST_BACKTRACE: 1
   RUSTFLAGS: -Dwarnings
   IROH_FORCE_STAGING_RELAYS: "1"