4.x
4.x: Convert from JUnit 4 to JUnit 6 (#8202)
4.x: Streamable: +delay +timeout +zip +onErrorResumeNext, cleanup (#8216)
4.x: Streamable +blockingFirst,last[OrError],skip ,S.flattenAsStreamable (#8229)
4.x: Streamable + doOnError, forEach(StreamerInput) (#8218)
4.x: Streamable + takeUntil + groupBy + refactor + helpers (#8215)
4.x: Fix consumer retention in cache() upon subscribe-cancel race (#8283)
4.x: Streamable + range, fromArray, take, error, defer (#8206)
4.x: Streamable + fromIterable, fromStream, hide, never, fixes (#8207)
4.x: Streamable API: DispatchStreamProcessor & other improvements (#8217)
4.x: Flowable API reduction: remaining operators & other related changes (#8200)
4.x: Streamable optimizations 2026.07.21 (#8254)