Add passthrough weight to Sudo (#4946)

* Add passthrough weight to Sudo

* Bump spec version

* Passthrough `pays_fee`

* Sudo always pays fee

* Use `FunctionOf`

* Add support for closure in dispatch classification

* Update docs

substrate/bin/node/runtime/src/lib.rs

@@ -82,8 +82,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to 0. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 219,
-	impl_version: 1,
+	spec_version: 220,
+	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 };
 
@@ -442,7 +442,7 @@ impl pallet_contracts::Trait for Runtime {
 
 impl pallet_sudo::Trait for Runtime {
 	type Event = Event;
-	type Proposal = Call;
+	type Call = Call;
 }
 
 /// A runtime transaction submitter.