Migrate everything to the 2018 edition (#1758)

substrate/core/consensus/aura/slots/Cargo.toml

@@ -6,7 +6,7 @@ description = "Generic slots-based utilities for consensus"
 edition = "2018"
 
 [dependencies]
-parity-codec = "3.0"
+codec = { package = "parity-codec", version = "3.0" }
 client = { package = "substrate-client", path = "../../../client" }
 primitives = { package = "substrate-primitives", path = "../../../primitives" }
 runtime_primitives = { package = "sr-primitives", path = "../../../sr-primitives" }

substrate/core/consensus/aura/slots/src/lib.rs

@@ -14,8 +14,6 @@
 // You should have received a copy of the GNU General Public License
 // along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
 
-extern crate parity_codec as codec;
-
 mod slots;
 
 pub use slots::{Slots, SlotInfo};
@@ -220,7 +218,7 @@ impl SlotDuration {
 		C: ProvideRuntimeApi,
 		C::Api: AuraApi<B>,
 	{
-		use parity_codec::Decode;
+		use codec::Decode;
 		const SLOT_KEY: &[u8] = b"aura_slot_duration";
 
 		match client.get_aux(SLOT_KEY)? {

substrate/core/consensus/rhd/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2018"
 
 [dependencies]
 futures = "0.1.17"
-parity-codec = { version = "3.0" }
+codec = { package = "parity-codec", version = "3.0" }
 parity-codec-derive = { version = "3.0" }
 primitives = { package = "substrate-primitives", path = "../../primitives" }
 consensus = { package = "substrate-consensus-common", path = "../common" }
@@ -27,8 +27,7 @@ rhododendron = { version = "0.5.0", features = ["codec"] }
 exit-future = "0.1"
 
 [dev-dependencies]
-substrate-keyring = { path = "../../keyring" }
-substrate-executor = { path = "../../executor" }
+keyring = { package = "substrate-keyring", path = "../../keyring" }
 
 [features]
 default = ["std"]

substrate/core/consensus/rhd/src/lib.rs

@@ -1318,8 +1318,6 @@ mod tests {
 	use primitives::H256;
 	use self::keyring::Keyring;
 
-	extern crate substrate_keyring as keyring;
-
 	type TestBlock = GenericTestBlock<()>;
 
 	struct FakeClient {