temporary getters for levels & _array, compatability with old color A…

…PI to work with WebGL mode on dev branch

src/color/p5.Color.js

@@ -492,6 +492,10 @@ p5.Color = class Color {
  get levels() {
  return [...this.color.coords, this.color.alpha].map(v => v * 255);
  }
+
+ get _array(){
+ return [...this.color.coords, this.color.alpha];
+ }
 };
 
 export default p5.Color;