Prepare for 0.5.0 release of Parley (#374)

- I have checked that the changelog is up to date (and determined that
no new entries were necessary). A couple of PRs are not listed, but
they're just adding derives for `Debug` or `Hash` impls for types which
doesn't seem useful to log in the changelog to me.
- I have run `cargo update --ignore-rust-version` and `cargo upgrade
--ignore-rust-version`
- I have bumped the versions of Parley and Fontique to `0.5.0`

A new release was requested in
https://xi.zulipchat.com/#narrow/channel/205635-parley/topic/New.20release.3F/with/521457605

---------

Signed-off-by: Nico Burns <nico@nicoburns.com>
Co-authored-by: Kaur Kuut <strom@nevermore.ee>

Author: nicoburns

CHANGELOG.md

@@ -8,18 +8,28 @@ Subheadings to categorize changes are `added, changed, deprecated, removed, fixe
 
 # Changelog
 
-The latest published Parley release is [0.4.0](#040---2025-05-08) which was released on 2025-05-08.
-You can find its changes [documented below](#040---2025-05-08).
+The latest published Parley release is [0.5.0](#050---2025-06-01) which was released on 2025-06-01.
+You can find its changes [documented below](#050---2025-06-01).
 
 ## [Unreleased]
 
 This release has an [MSRV] of 1.82.
 
 ### Added
 
+### Changed
+
+### Fixed
+
+## [0.5.0] - 2025-06-01
+
+This release has an [MSRV] of 1.82.
+
+### Added
+
 #### Parley
 
-- Editor features required by Android IME. ([#334][] by [@mwcampbell][]
+- Editor features required by Android IME. ([#334][] by [@mwcampbell][])
 
 ### Changed
 
@@ -33,8 +43,6 @@ This release has an [MSRV] of 1.82.
     This will affect layout if you don't specify your own line height.
 - Breaking change: `{RangedBuilder, TreeBuilder}::{build_into, build}` methods now consume `self`. ([#369][] by [@dhardy][])
 
-### Fixed
-
 ## [0.4.0] - 2025-05-08
 
 This release has an [MSRV] of 1.82.