Upgrade to edition 2021

src/ops.rs

@@ -1,12 +1,12 @@
-use binread::BinRead;
-use frame::Frame;
-use machine::Machine;
+use crate::binread::BinRead;
+use crate::frame::Frame;
+use crate::machine::Machine;
 use std::io::Read;
 use std::num::Wrapping;
-use Result;
-use value::Value;
+use crate::Result;
+use crate::value::Value;
 use std::convert::TryInto;
-use netstack::NetStack;
+use crate::netstack::NetStack;
 
 pub type OpFunc = fn(&mut Machine) -> Result<()>;