prepared CHANGELOG.md for releasing version 0.4.8

CHANGELOG.md

@@ -13,10 +13,6 @@ cfr. [keepachangelog.com](https://keepachangelog.com/en/1.1.0/)
 
 ### Added
 
-- a CHANGELOG.md file to track notable changes
-- a getTimestamp(value) function argument to both the 'debounce' and the 'throttle' operators,
-  so the timestamps can be 'prerecorded' inside the values
-
 ### Changed
 
 ### Deprecated
@@ -27,6 +23,35 @@ cfr. [keepachangelog.com](https://keepachangelog.com/en/1.1.0/)
 
 ### Security
 
+
+## version 0.4.8 (2024-08-08)
+
+### Added
+- a getTimestamp(value) function argument to both the 'debounce' and the 'throttle' operators,
+  so the timestamps can be 'prerecorded' inside the values
+- a CHANGELOG.md file to track notable changes
+- for itr8 developers:
+  - pkg:update_script npm script to make it easier to edit multi-line package.json scripts
+
+### Changed
+
+- for itr8 developers:
+  - Edited version npm script to check if the CHANGELOG.md has been properly updated before bumping the version
+
 ## version 0.4.7 (2024-07-13)
 
-### Fixed
+### Added
+
+- Added branchAndMerge operator to do multiple operations on the same source iterator
+  and then combining the results in a tuple
+
+### Changed
+
+- improved itr8ToMultiIterable to be able to use it synchronously as well
+- and some changes that might interest itr8 developers:
+  - preversion script: removed node 12 tests (since mocha 18 needs node >= 14) and added node 22 tests
+  - .github/workflows/node.js.yml added node 22 to matrix tests
+  - removed a (performance related) test that was failing on github workflow node 18
+  - Updated ts-node + formatting fixes
+  - Upgraded sinon from 15 to 1`
+  - package.json: improved ```npm run gitDiff``` to allow comparing with another branch