Update changelog for release of v0.1.4.

Author: de-vri-es

Diff for: CHANGELOG.md

@@ -23,6 +23,11 @@
 * Return a `ShutdownAlreadyStarted` error when calling `trigger_shutdown()` multiple times.
 * Change the output type of `WrapCancel` futures from `Option` to a `Result` with the shutdown reason as error.
 
+# Version 0.1.4 - 2024-03-22
+* Fix shutdown_complete() completing before shutdown even started.
+* Fix bug where the list of wakers to trigger on shutdown or shutdown completion could grow indefinitely.
+
+
 # Version 0.1.3 - 2023-08-14
 * Mark all future wrappers as `#[must_use]`.