• Implement the library for the Web Assembly (Wasm) for JavaScript (#3713). Thanks @igoriakovlev!
• Major Kotlin version update: was 1.8.20, became 1.9.21.
• On Android, ensure that Dispatchers.Main != Dispatchers.Main.immediate (#3545, #3963).
• Fixed a bug that caused Flow operators that limit cancel the upstream flow to forget that they were already finished if there is another such operator upstream (#4035, #4038).
• kotlinx-coroutines-debug is published with the correct Java 9 module info (#3944).
• kotlinx-coroutines-debug no longer requires manually setting DebugProbes.enableCoroutineCreationStackTraces to false, it's the default (#3783).
• kotlinx-coroutines-test: set the default timeout of runTest to 60 seconds, added the ability to configure it on the JVM with the kotlinx.coroutines.test.default_timeout=10s (#3800).
• kotlinx-coroutines-test: fixed a bug that could lead to not all uncaught exceptions being reported after some tests failed (#3800).
• delay(Duration) rounds nanoseconds up to whole milliseconds and not down (#3920). Thanks @kevincianfarini!
• Dispatchers.Default and the default thread for background work are guaranteed to use the same context classloader as the object containing it them (#3832).
• It is guaranteed that by the time SharedFlow.collect suspends for the first time, it's registered as a subscriber for that SharedFlow (#3885). Before, it was also true, but not documented.
• Atomicfu version is updated to 0.23.1, and Kotlin/Native atomic transformations are enabled, reducing the footprint of coroutine-heavy code (#3954).
• Added a workaround for miscompilation of withLock on JS (#3881). Thanks @CLOVIS-AI!
• Small tweaks and documentation fixes.