Merge pull request #600 from SanderMertens/patch-1

Fix SAPP_EVENTYTPE_KEY_UP typo

sokol_app.h

@@ -404,7 +404,7 @@
             - SAPP_EVENTTYPE_MOUSE_DOWN
             - SAPP_EVENTTYPE_MOUSE_UP
             - SAPP_EVENTTYPE_MOUSE_SCROLL
-            - SAPP_EVENTYTPE_KEY_UP
+            - SAPP_EVENTTYPE_KEY_UP
             - SAPP_EVENTTYPE_KEY_DOWN
         - The mouse lock/unlock action on the web platform is asynchronous,
           this means that sapp_mouse_locked() won't immediately return