add webkitSupportsFullscreen

package.json

@@ -35,7 +35,7 @@
         "@babel/plugin-transform-runtime": "^7.12.1",
         "@babel/preset-env": "^7.12.7",
         "@babel/runtime": "^7.12.5",
-        "autoprefixer": "^10.0.2",
+        "autoprefixer": "^9.8.6",
         "babel-eslint": "^10.1.0",
         "browser-env": "^3.3.0",
         "chai": "^4.2.0",