Migrate to the 2018 edition (#273)

polkadot/statement-table/Cargo.toml

@@ -2,9 +2,9 @@
 name = "polkadot-statement-table"
 version = "0.1.0"
 authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
 
 [dependencies]
-parity-codec = "3.0"
-parity-codec-derive = "3.0"
+parity-codec = { version = "3.0", features = ["derive"] }
 substrate-primitives = { git = "https://github.com/paritytech/substrate", branch = "polkadot-master" }
-polkadot-primitives = { path = "../primitives" }
+primitives = { package = "polkadot-primitives", path = "../primitives" }

polkadot/statement-table/src/generic.rs

@@ -28,6 +28,8 @@ use std::collections::hash_map::{HashMap, Entry};
 use std::hash::Hash;
 use std::fmt::Debug;
 
+use parity_codec::{Encode, Decode};
+
 /// Context for the statement table.
 pub trait Context {
 	/// A authority ID

polkadot/statement-table/src/lib.rs

@@ -14,13 +14,6 @@
 //! propose and attest to validity of candidates, and those who can only attest
 //! to availability.
 
-extern crate parity_codec as codec;
-extern crate substrate_primitives;
-extern crate polkadot_primitives as primitives;
-
-#[macro_use]
-extern crate parity_codec_derive;
-
 pub mod generic;
 
 pub use generic::Table;