feat: upgrade weapp-polyfill to support upload progress in weapp (#520)

Author: leeyeh

package.json

@@ -54,7 +54,7 @@
     "qiniu": "^6.1.11",
     "should": "^11.1.0",
     "typescript": "^2.4.1",
-    "weapp-polyfill": "^1.1.0",
+    "weapp-polyfill": "^2.0.0",
     "webpack": "^2.2.0-rc.3"
   },
   "license": "MIT",

src/file.js

@@ -463,7 +463,7 @@ module.exports = function(AV) {
     /**
      * Saves the file to the AV cloud.
      * @param {Object} [options]
-     * @param {UploadProgressCallback} [options.onprogress] 文件上传进度，在 Node.js 与小程序中无效，回调参数说明详见 {@link UploadProgressCallback}。
+     * @param {UploadProgressCallback} [options.onprogress] 文件上传进度，在 Node.js 中无效，回调参数说明详见 {@link UploadProgressCallback}。
      * @return {Promise} Promise that is resolved when the save finishes.
      */
     save(options) {