Enabled OpenGL ES 3 support for Windows/Linux/Android when SDL 2.0.4+ is used, since that SDL version fixed its EGL code for GLES 3+.

src/modules/graphics/opengl/wrap_Graphics.h

@@ -61,7 +61,7 @@ int w_newFont(lua_State *L);
 int w_newImageFont(lua_State *L);
 int w_newSpriteBatch(lua_State *L);
 int w_newParticleSystem(lua_State *L);
-int w_newCanvas(lua_State *L);  // comments in function
+int w_newCanvas(lua_State *L);
 int w_newShader(lua_State *L);
 int w_newMesh(lua_State *L);
 int w_newText(lua_State *L);