Update the options to use the correct "extend" of object way.

Author: lpatiny

src/gsdLight.js

@@ -1,6 +1,6 @@
 
 function gsdLight(x, y, options){
-    var options=options || {};
+    var options=Object.create(options || {});
     if (options.minMaxRatio===undefined) options.minMaxRatio=0.00025;
     if (options.noiseLevel===undefined) options.noiseLevel=0;
     if (options.maxCriteria===undefined) options.maxCriteria=true;

src/index.js

@@ -10,7 +10,7 @@ options:
  */
 
 function gsd(x, y, options){
-    var options=options || {};
+    var options=Object.create(options || {});
     if (options.minMaxRatio===undefined) options.minMaxRatio=0.00025;
     if (options.broadRatio===undefined) options.broadRatio=0.0025;
     if (options.noiseLevel===undefined) options.noiseLevel=0;