sdl2 version 3

tools/ports/sdl.py

@@ -1,6 +1,6 @@
 import os, shutil, logging
 
-VERSION = 2
+VERSION = 3
 
 def get_with_configure(ports, settings, shared): # not currently used; no real need for configure on emscripten users' machines!
   if settings.USE_SDL == 2: