Clippy bump (#2877)

* Bumping clippy

* Fixing warnings

* Fix the "fix"

ethcore/src/miner/transaction_queue.rs

@@ -446,6 +446,7 @@ pub struct AccountDetails {
 const GAS_LIMIT_HYSTERESIS: usize = 10; // (100/GAS_LIMIT_HYSTERESIS) %
 
 /// Describes the strategy used to prioritize transactions in the queue.
+#[cfg_attr(feature="dev", allow(enum_variant_names))]
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub enum PrioritizationStrategy {
 	/// Use only gas price. Disregards the actual computation cost of the transaction.