Upgrade elastic-array to 0.9.0

This is a huge change, which includes some changes to replace code that
originally cloned to reuse allocations instead. The updated
`elastic-array` crate renames its consuming `Vec`-conversion method to
`into_vec`, which means that I can do a simple
`sed -i 's/to_vec/into_vec/'` and then fix the compilation errors.

This commit is probably a minor performance win and definitely a
significant readability win.

evmbin/src/display/json.rs

@@ -122,7 +122,7 @@ impl trace::VMTracer for Informant {
 	fn prepare_subtrace(&self, code: &[u8]) -> Self where Self: Sized {
 		let mut vm = Informant::default();
 		vm.depth = self.depth + 1;
-		vm.code = code.to_vec();
+		vm.code = code.into_vec();
 		vm.gas_used = self.gas_used;
 		vm
 	}