build: bump minimal Windows version to 10

README.md

@@ -37,7 +37,7 @@ Releases can be found on the [release list][releases].
 ## System requirements
 
 - A not too ancient Linux (usually, only the latest releases of distributions
-  are actively supported), Windows 10 or later, or macOS 10.15 or later.
+  are actively supported), Windows 10 1607 or later, or macOS 10.15 or later.
 - A somewhat capable CPU. Hardware decoding might help if the CPU is too slow to
   decode video in realtime, but must be explicitly enabled with the `--hwdec`
   option.

meson.build

@@ -307,7 +307,7 @@ features += {'darwin': darwin}
 features += {'posix': posix}
 features += {'dos-paths': win32, 'win32': win32}
 
-mswin_flags = ['-D_WIN32_WINNT=0x0602', '-DWINVER=0x0602', '-DUNICODE',
+mswin_flags = ['-D_WIN32_WINNT=0x0A00', '-DWINVER=0x0A00', '-DUNICODE',
                '-DCOBJMACROS', '-DINITGUID', '-DNOMINMAX',
                '-D_USE_MATH_DEFINES', '-DWIN32_LEAN_AND_MEAN',
                '-D_CRT_DECLARE_NONSTDC_NAMES', '-D_CRT_NONSTDC_NO_WARNINGS',