Implement support for renaming runtime api functions (#2160)

* Implement support for renaming runtime api functions

* Redelete the wasm files

* FIxes test

* Fix test correctly...

* Bring back old `authorities`

* Tag as deprecated

* Fixes compilation on WASM

* Add missing method implementations

* Fixes tests

* Increase `spec_version`

substrate/core/sr-api-macros/tests/decl_and_impl.rs

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
-use runtime_primitives::traits::{GetNodeBlockType, Block as BlockT};
+use runtime_primitives::traits::{GetNodeBlockType, Block as BlockT, AuthorityIdFor};
 use runtime_primitives::generic::BlockId;
 use client::runtime_api::{self, RuntimeApiInfo};
 use client::{error::Result, decl_runtime_apis, impl_runtime_apis};
@@ -74,6 +74,9 @@ impl_runtime_apis! {
 		fn initialize_block(_: &<Block as BlockT>::Header) {
 			unimplemented!()
 		}
+		fn authorities() -> Vec<AuthorityIdFor<Block>> {
+			unimplemented!()
+		}
 	}
 }