TLDR:

Notable changes:
* New Hyper-V headers and libraries by Biswapriyo Nath
* Many headers updated from Wine by Jacek Caban.
* ARM math improvements by Martin Storsjö
* floating point fixes by Liu Hao
* many *printf compatibility fixes by Liu Hao and Martin Storsjö
* massive Windows App Store API updates by Steve Lhomme
* winstorecompat library updates by Martin Storsjö
* __USE_MINGW_ANSI_STDIO now automatically enabled in C99 and C11 mode when not using UCRT by Pali Rohár
* wdm and ddk updates by Zebediah Figura
* UCRT for Windows Store Apps (-lucrtapp) by Martin Storsjö
* Audioclient and ActivateAudioInterfaceAsync API updates by Liu Hao
* DirectX SDKs are now always installed

Thanks,

Richard