tower: prepare to releasse v0.4.3 (#528)

I also fixed up the changelog entries for v0.4.2 while I was here.

Signed-off-by: Eliza Weisman <eliza@buoyant.io>

tower/CHANGELOG.md

@@ -3,12 +3,39 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+# 0.4.3 (January 13, 2021)
+
+### Added
+
+- **filter**: `Filter::check` and `AsyncFilter::check` methods which check a
+  request against the filter's `Predicate` ([#521])
+- **filter**: Added `get_ref`, `get_mut`, and `into_inner` methods to `Filter`
+  and `AsyncFilter`, allowing access to the wrapped service ([#522])
+- **util**: Added `layer` associated function to `AndThen`, `Then`,
+  `MapRequest`, `MapResponse`, and `MapResult` types. These return a `Layer`
+  that produces middleware of that type, as a convenience to avoid having to
+  import the `Layer` type separately. ([#524])
+- **util**: Added missing `Clone` impls to `AndThenLayer`, `MapRequestLayer`,
+  and `MapErrLayer`, when the mapped function implements `Clone` ([#525])
+- **util**: Added `FutureService::new` constructor, with less restrictive bounds
+  than the `future_service` free function ([#523])
+
+[#521]: https://github.com/tower-rs/tower/pull/521
+[#522]: https://github.com/tower-rs/tower/pull/522
+[#523]: https://github.com/tower-rs/tower/pull/523
+[#524]: https://github.com/tower-rs/tower/pull/524
+[#525]: https://github.com/tower-rs/tower/pull/525
 
 # 0.4.2 (January 11, 2021)
 
-- Fix missing `Sync` implementation for `Buffer` and `ConcurrencyLimit` ([#518])
+### Added
+
 - Export `layer_fn` and `LayerFn` from the `tower::layer` module. ([#516])
 
+### Fixed
+
+- Fix missing `Sync` implementation for `Buffer` and `ConcurrencyLimit` ([#518])
+
 [#518]: https://github.com/tower-rs/tower/pull/518
 [#516]: https://github.com/tower-rs/tower/pull/516
 

tower/Cargo.toml

@@ -8,13 +8,13 @@ name = "tower"
 #   - README.md
 # - Update CHANGELOG.md.
 # - Create "vX.X.X" git tag.
-version = "0.4.2"
+version = "0.4.3"
 authors = ["Tower Maintainers <team@tower-rs.com>"]
 license = "MIT"
 readme = "README.md"
 repository = "https://github.com/tower-rs/tower"
 homepage = "https://github.com/tower-rs/tower"
-documentation = "https://docs.rs/tower/0.4.2"
+documentation = "https://docs.rs/tower/0.4.3"
 description = """
 Tower is a library of modular and reusable components for building robust
 clients and servers.

tower/src/lib.rs

@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/tower/0.4.2")]
+#![doc(html_root_url = "https://docs.rs/tower/0.4.3")]
 #![warn(
     missing_debug_implementations,
     missing_docs,