Implement runtime version checks in set_code (#4548)

* Implement runtime version checks in `set_code`

Check that the new runtime code given to `set_code` fullfills some
requirements:

- `spec_name` matches
- `spec_version` does not decreases
- `impl_version` does not decreases
- Either `spec_version` and `impl_version` increase

* Make tests almost work

* Some fixes after master merge

* Fix tests

* Add missed file

* Make depedency check happy?

* Remove leftover `sc-executor`

* AHHHHH

* Reset debug stuff

* Remove some 'static

* More 'static

* Some docs

* Update `Cargo.lock`

substrate/client/src/light/call_executor.rs

@@ -222,7 +222,7 @@ pub fn check_execution_proof<Header, E, H>(
 ) -> ClientResult<Vec<u8>>
 	where
 		Header: HeaderT,
-		E: CodeExecutor,
+		E: CodeExecutor + Clone + 'static,
 		H: Hasher,
 		H::Out: Ord + codec::Codec + 'static,
 {
@@ -248,7 +248,7 @@ fn check_execution_proof_with_make_header<Header, E, H, MakeNextHeader: Fn(&Head
 ) -> ClientResult<Vec<u8>>
 	where
 		Header: HeaderT,
-		E: CodeExecutor,
+		E: CodeExecutor + Clone + 'static,
 		H: Hasher,
 		H::Out: Ord + codec::Codec + 'static,
 {