Use EncodeLike for storages traits (#3676)

* impl

* patch

* lock

* some refactor

* some avoided copy

* new api without ref for doublemap

* fix

* version bump

* fix

* point to incoming release

* use codec latest

* bumpd impl version

* fix unused

* fix

* Update srml/support/src/storage/mod.rs

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/srml/elections-phragmen/src/lib.rs

@@ -539,7 +539,7 @@ impl<T: Trait> Module<T> {
 
 			// sort and save the members.
 			new_members.sort();
-			<Members<T>>::put(new_members.clone());
+			<Members<T>>::put(&new_members);
 
 			// save the runners as-is
 			<RunnersUp<T>>::put(runners_up);