• Fixed a bug with ThreadLocalElement not being correctly updated when the most outer suspend function was called directly without kotlinx.coroutines (#2930).
• Fixed multiple data races: one that might have been affecting runBlocking event loop, and a benign data race in Mutex (#3250, #3251).
• Obsolete TestCoroutineContext is removed, which fixes the kotlinx-coroutines-test JPMS package being split between kotlinx-coroutines-core and kotlinx-coroutines-test (#3218).
• Updated the ProGuard rules to further shrink the size of the resulting DEX file with coroutines (#3111, #3263). Thanks, @agrieve!
• Atomicfu is updated to 0.17.2, which includes a more efficient and robust JS IR transformer (#3255).
• Kotlin is updated to 1.6.21, Gradle version is updated to 7.4.2 (#3281). Thanks, @wojtek-kalicinski!
• Various documentation improvements.