chore: update changelog

Author: AlCalzone

README.md

@@ -142,6 +142,9 @@ The file will be overwritten if it exists. The 2nd options argument can be used
 	Placeholder for next release:
 	### __WORK IN PROGRESS__
 -->
+### __WORK IN PROGRESS__
+* Individual writes are now collected in a string and written at once, increasing throughput for larger entries by ~10x.
+
 ### 2.4.0 (2021-12-27)
 * Stringifying the individual lines now happens lazily and only when actually necessary, increasing the throughput by 30...50x.