0.3.30

• Add {BiLock,SplitStream,SplitSink,ReadHalf,WriteHalf}::is_pair_of (#2797)
• Fix panic in FuturesUnordered::clear (#2809)
• Fix panic in AsyncBufReadExt::fill_buf (#2801, #2812)
• Improve support for targets without atomic CAS (#2811)
• Remove build scripts (#2811)