fix: disable object element handler (#122)

the `object` without `visibility: hidden` may trigger some bugs in `contenteditable`

Author: imcuttle

src/detection-strategy/object.js

@@ -69,7 +69,7 @@ module.exports = function(options) {
         var debug = options.debug;
 
         function injectObject(element, callback) {
-            var OBJECT_STYLE = buildCssTextString(["display: block", "position: absolute", "top: 0", "left: 0", "width: 100%", "height: 100%", "border: none", "padding: 0", "margin: 0", "opacity: 0", "z-index: -1000", "pointer-events: none"]);
+            var OBJECT_STYLE = buildCssTextString(["display: block", "position: absolute", "top: 0", "left: 0", "width: 100%", "height: 100%", "border: none", "padding: 0", "margin: 0", "opacity: 0", "z-index: -1000", "pointer-events: none", "visibility: hidden"]);
 
             //The target element needs to be positioned (everything except static) so the absolute positioned object will be positioned relative to the target element.