Switch to 2021 edition (#172)

ntex-bytes/Cargo.toml

@@ -9,7 +9,7 @@ repository = "https://github.com/ntex-rs"
 readme = "README.md"
 keywords = ["buffers", "zero-copy", "io"]
 categories = ["network-programming", "data-structures"]
-edition = "2018"
+edition = "2021"
 
 [features]
 default = []

ntex-bytes/src/bytes.rs

@@ -1,5 +1,4 @@
 use std::borrow::{Borrow, BorrowMut};
-use std::iter::{FromIterator, Iterator};
 use std::ops::{Deref, DerefMut, RangeBounds};
 use std::sync::atomic::Ordering::{Acquire, Relaxed, Release};
 use std::sync::atomic::{self, AtomicUsize};
@@ -4049,7 +4048,7 @@ fn abort() {
 
 #[cfg(test)]
 mod tests {
-    use std::{collections::HashMap, convert::TryFrom};
+    use std::collections::HashMap;
 
     use super::*;
 

ntex-bytes/src/string.rs

@@ -1,5 +1,5 @@
 //! A UTF-8 encoded read-only string using Bytes as storage.
-use std::{borrow, convert::TryFrom, fmt, hash, ops, slice, str};
+use std::{borrow, fmt, hash, ops, slice, str};
 
 use crate::{Bytes, BytesMut, BytesVec};
 

ntex-bytes/tests/test_bytes.rs

@@ -96,7 +96,6 @@ fn fmt() {
 #[test]
 fn fmt_write() {
     use std::fmt::Write;
-    use std::iter::FromIterator;
     let s = String::from_iter((0..10).map(|_| "abcdefg"));
 
     let mut a = BytesMut::with_capacity(64);