Fixed #1 - Fixed the whatsnew-** script for loading release notes into builds

Added test to ensure that release notes are parsed properly
Updated to latest dependencies to fix security vulnerability
Updated GH Actions Workflow to run test before updating tag
Updated README.md to reflect proper whatsnew documentation.

node_modules/node-notifier/CHANGELOG.md

@@ -1,5 +1,17 @@
 # Changelog
 
+### `v5.4.3`
+
+- Reverts breaking dependency upgrades from `v5.4.2` as some dependencies has removed Node 6 which is a breaking change.
+
+### `v5.4.2`
+
+- Updates dependencies
+
+### `v5.4.1`
+
+- Reverts changes to default timeout as they are causing some issues. See [#271](https://github.com/mikaelbr/node-notifier/pull/271)
+
 ### `v5.4.0`
 
 - Prevent Spotlight from indexing terminal-notifier.app ([#238](https://github.com/mikaelbr/node-notifier/pull/238))