Add Release Note (feature): Comes with the MSYS2 runtime (Git for Windows flavor) based on [Cygwin v3.5.4](https://inbox.sourceware.org/cygwin-announce/[email protected]/), which drops Windows 7 and Windows 8 support.

Add Release Note (feature): Comes with the MSYS2 runtime (Git for Windows flavor) based on [Cygwin v3.5.4](https://inbox.sourceware.org/cygwin-announce/[email protected]/), which drops Windows 7 and Windows 8 support. #142