Migrate to three.js r172

demos/hello-three/demo.js

     _initLight()
     {
         const ambientLight = new THREE.AmbientLight(0xffffff);
-        ambientLight.intensity = 1.5;
+        ambientLight.intensity = 1.0 * Math.PI;
 
         const ar = this.ar;
         ar.scene.add(ambientLight);

demos/hello-three/index.html

         <script type="importmap">
         {
             "imports": {
-                "three": "https://cdn.jsdelivr.net/npm/three@0.147.0/build/three.module.js",
-                "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.147.0/examples/jsm/",
+                "three": "https://cdn.jsdelivr.net/npm/three@0.172.0/build/three.module.js",
+                "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.172.0/examples/jsm/",
                 "three-with-encantar": "../../plugins/three-with-encantar.js"
             }
         }

demos/hello-three/video.html

         <script type="importmap">
         {
             "imports": {
-                "three": "https://cdn.jsdelivr.net/npm/three@0.147.0/build/three.module.js",
-                "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.147.0/examples/jsm/",
+                "three": "https://cdn.jsdelivr.net/npm/three@0.172.0/build/three.module.js",
+                "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.172.0/examples/jsm/",
                 "three-with-encantar": "../../plugins/three-with-encantar.js"
             }
         }

plugins/three-with-encantar.js

 /* Usage of the indicated versions is encouraged */
 __THIS_PLUGIN_HAS_BEEN_TESTED_WITH__({
     'encantar.js': { version: '0.4.1' },
-       'three.js': { version: '147' }
+       'three.js': { version: '172' }
 });
 
 /**