Fixed another batch of clippy warnings

Those are mostly readability-related. Also did a cargo update.

protocol/src/format.rs

@@ -33,7 +33,7 @@ impl Component {
                 convert_legacy(&mut component);
             },
         }
-        return component;
+        component
     }
 
     pub fn from_value(v: &serde_json::Value) -> Self {

protocol/src/nbt/mod.rs

@@ -14,7 +14,7 @@
 
 use std::collections::HashMap;
 use std::io;
-use std::io::{Read, Write};
+use std::io::Read;
 
 use super::protocol::Serializable;
 use super::protocol;

protocol/src/types/bit/set.rs

@@ -68,7 +68,7 @@ impl Set {
 
     pub fn or(&mut self, other: &Set) {
         for (a, b) in self.data.iter_mut().zip(&other.data) {
-            *a = (*a) | *b;
+            *a |= *b;
         }
     }
 }

protocol/src/types/metadata.rs

@@ -15,7 +15,6 @@
 use std::collections::HashMap;
 use std::marker::PhantomData;
 use std::io;
-use std::io::Write;
 use std::fmt;
 use protocol;
 use protocol::Serializable;