Run cargo fix on a few of the worst offenders (#10854)

* Run cargo fix on `vm`

* Run cargo fix on ethcore-db

* Run cargo fix on evm

* Run cargo fix on ethcore-light

* Run cargo fix on journaldb

* Run cargo fix on wasm

* Missing docs

* Run cargo fix on ethcore-sync

ethcore/wasm/src/runtime.rs

@@ -32,7 +32,7 @@ pub struct RuntimeContext {
 pub struct Runtime<'a> {
 	gas_counter: u64,
 	gas_limit: u64,
-	ext: &'a mut vm::Ext,
+	ext: &'a mut dyn vm::Ext,
 	context: RuntimeContext,
 	memory: MemoryRef,
 	args: Vec<u8>,
@@ -147,7 +147,7 @@ impl<'a> Runtime<'a> {
 
 	/// New runtime for wasm contract with specified params
 	pub fn with_params(
-		ext: &mut vm::Ext,
+		ext: &mut dyn vm::Ext,
 		memory: MemoryRef,
 		gas_limit: u64,
 		args: Vec<u8>,