fix: windows, define WIN32_LEAN_AND_MEAN so that windows.h behaves correctly

Author: Totto16

src/discord/core.hpp

@@ -12,6 +12,9 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
 #endif
 
 #include <discord.h>

src/libs/core/helper/sleep.cpp

@@ -7,6 +7,9 @@
 #ifndef NOMINMAX
 #define NOMINMAX
 #endif
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
 #include <windows.h>
 #else
 #include <cerrno>