Change decl_storage! to import the storage traits automatically (#3674)

* decl_storage imports needed traits

* bump impl_version

* Update srml/system/src/lib.rs

Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

* Update srml/system/src/lib.rs

Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

substrate/node/runtime/src/lib.rs

@@ -85,7 +85,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
 	spec_version: 162,
-	impl_version: 162,
+	impl_version: 163,
 	apis: RUNTIME_API_VERSIONS,
 };