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/mod.rs

@@ -73,7 +73,7 @@ pub fn new_light<B, S, GS, RA, E>(
 		B: BlockT,
 		S: BlockchainStorage<B> + 'static,
 		GS: BuildStorage,
-		E: CodeExecutor + RuntimeInfo,
+		E: CodeExecutor + RuntimeInfo + Clone + 'static,
 {
 	let local_executor = LocalCallExecutor::new(backend.clone(), code_executor);
 	let executor = GenesisCallExecutor::new(backend.clone(), local_executor);