update master to V7

cypress/integration/unit/select.js

@@ -12,6 +12,28 @@ describe('select', function () {
   const mockConfig = {
     dimensions: [640, 480]
   };
+  const dataStorage = {
+    _storage: new WeakMap(),
+    put: function (element, key, obj) {
+      if (!this._storage.has(element)) {
+        this._storage.set(element, new Map());
+      }
+      this._storage.get(element).set(key, obj);
+    },
+    get: function (element, key) {
+      return this._storage.get(element).get(key);
+    },
+    has: function (element, key) {
+      return this._storage.has(element) && this._storage.get(element).has(key);
+    },
+    remove: function (element, key) {
+      var ret = this._storage.get(element).delete(key);
+      if (!this._storage.get(element).size === 0) {
+        this._storage.delete(element);
+      }
+      return ret;
+    }
+  };  
 
   /**
   * @implements {module:select.SVGFactory}
@@ -25,7 +47,8 @@ describe('select', function () {
       return elem;
     },
     svgRoot () { return svgroot; },
-    svgContent () { return svgcontent; }
+    svgContent () { return svgcontent; },
+    getDataStorage () { return dataStorage; }
   };
 
   /**
@@ -37,13 +60,13 @@ describe('select', function () {
       element: 'svg',
       attr: {id: 'svgroot'}
     });
-    svgcontent = svgroot.appendChild(
-      mockFactory.createSVGElement({
-        element: 'svg',
-        attr: {id: 'svgcontent'}
-      })
-    );
-    /* const rect = */ svgcontent.appendChild(
+    svgcontent = mockFactory.createSVGElement({
+      element: 'svg',
+      attr: {id: 'svgcontent'}
+    });
+
+    svgroot.append(svgcontent);
+    /* const rect = */ svgcontent.append(
       mockFactory.createSVGElement({
         element: 'rect',
         attr: {