Merge branch 'master' of https://github.com/jdf2e/nutui into v2

package.json

@@ -66,6 +66,7 @@
     "@babel/preset-env": "7.1.0",
     "@nutui/carefree": "^0.4.0",
     "@tweenjs/tween.js": "17.2.0",
+    "istanbul-instrumenter-loader": "^3.0.1",
     "@vue/test-utils": "1.0.0-beta.25",
     "autoprefixer": "9.1.3",
     "babel-eslint": "8.2.6",