Prepare 0.22 release

CHANGELOG.md

@@ -4,6 +4,7 @@ All notable changes will be documented in this file.
 
 This document is written according to the [Keep a Changelog][kac] style.
 
+1. [0.22](#022)
 1. [0.21](#021)
    1. [0.21.1](#0211)
    1. [0.21.0](#0210)
@@ -64,6 +65,20 @@ This document is written according to the [Keep a Changelog][kac] style.
 1. [0.2.0](#020-1)
 1. [0.1.0](#010-1)
 
+## 0.22
+
+### 0.22.0 <!-- omit in toc -->
+
+This updates the MSRV to Rust 1.51 in order to use const-generics and other new
+APIs.
+
+It also extracts the pointer mutability tracking to `wyz 0.4` and takes
+advantage of `0.20`’s pointer overhaul to improve performance in `BitSlice`
+methods.
+
+While some internal APIs have been reshuffled, the test suite indicates that no
+user-facing changes have occurred except for the MSRV raise.
+
 ## 0.21
 
 ### 0.21.1

Cargo.toml

@@ -65,8 +65,7 @@ optional = true
 version = "1"
 
 [dependencies.wyz]
-path = "../../myrrlyn/wyz"
-# version = "0.4"
+version = "0.4"
 default-features = false
 
 # Crates required when running the test suite.

src/ptr/range.rs

@@ -19,10 +19,11 @@ use core::{
 	},
 };
 
+#[cfg(feature = "alloc")]
+use super::Mut;
 use super::{
 	BitPtr,
 	BitSpan,
-	Mut,
 	Mutability,
 };
 use crate::{