🔧 Pass actor to shader creation method

docs/how-to-create-new-effects.md

@@ -144,7 +144,7 @@ var SimpleFade = class SimpleFade {
   // ---------------------------------------------------------------- API for extension.js
 
   // This is called from extension.js whenever a window is closed with this effect.
-  static createShader(settings) {
+  static createShader(actor, settings) {
     return new Shader(settings);
   }