Bump error-chain (#245)

* Bump error-chain

* Fix compilation errors

polkadot/api/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
-error-chain = "0.11"
+error-chain = "0.12"
 polkadot-executor = { path = "../executor" }
 polkadot-runtime = { path = "../runtime" }
 polkadot-primitives = { path = "../primitives" }

polkadot/cli/Cargo.toml

@@ -7,7 +7,7 @@ description = "Polkadot node implementation in Rust."
 [dependencies]
 clap = { version = "2.27", features = ["yaml"] }
 env_logger = "0.4"
-error-chain = "0.11"
+error-chain = "0.12"
 log = "0.3"
 atty = "0.2"
 regex = "0.2"

polkadot/consensus/Cargo.toml

@@ -8,7 +8,7 @@ futures = "0.1.17"
 parking_lot = "0.4"
 tokio-core = "0.1.12"
 ed25519 = { path = "../../substrate/ed25519" }
-error-chain = "0.11"
+error-chain = "0.12"
 log = "0.3"
 exit-future = "0.1"
 polkadot-api = { path = "../api" }

polkadot/parachain/Cargo.toml

@@ -7,7 +7,7 @@ description = "Types and utilities for creating and working with parachains"
 [dependencies]
 substrate-codec = { path = "../../substrate/codec", default-features = false }
 wasmi = { version = "0.1", optional = true }
-error-chain = { version = "0.11", optional = true }
+error-chain = { version = "0.12", optional = true }
 
 [dev-dependencies]
 tiny-keccak = "1.4"

polkadot/service/Cargo.toml

@@ -7,7 +7,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 futures = "0.1.17"
 parking_lot = "0.4"
 tokio-timer = "0.1.2"
-error-chain = "0.11"
+error-chain = "0.12"
 lazy_static = "1.0"
 log = "0.3"
 slog = "^2"

polkadot/transaction-pool/Cargo.toml

@@ -5,7 +5,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 
 [dependencies]
 log = "0.3.0"
-error-chain = "0.11"
+error-chain = "0.12"
 parking_lot = "0.4"
 polkadot-api = { path = "../api" }
 polkadot-primitives = { path = "../primitives" }