_mingw_mac.h: bump to 5.0.5

Signed-off-by: Jonathan Yong <10walls@gmail.com>
diff --git a/mingw-w64-headers/crt/_mingw_mac.h b/mingw-w64-headers/crt/_mingw_mac.h
index 5f0297c..f3e2a83 100644
--- a/mingw-w64-headers/crt/_mingw_mac.h
+++ b/mingw-w64-headers/crt/_mingw_mac.h
@@ -13,7 +13,7 @@
 
 #define __MINGW64_VERSION_MAJOR 5
 #define __MINGW64_VERSION_MINOR 0
-#define __MINGW64_VERSION_BUGFIX 4
+#define __MINGW64_VERSION_BUGFIX 5
 
 /* This macro holds an monotonic increasing value, which indicates
    a specific fix/patch is present on trunk.  This value isn't related to