Merge pull request #1078 from transloadit/fix/resize-observer-default

Fixing ResizeObserver is not a constructor, issue #1070

packages/@uppy/dashboard/src/index.js

@@ -8,7 +8,7 @@ const ThumbnailGenerator = require('@uppy/thumbnail-generator')
 const findAllDOMElements = require('@uppy/utils/lib/findAllDOMElements')
 const toArray = require('@uppy/utils/lib/toArray')
 const prettyBytes = require('prettier-bytes')
-const ResizeObserver = require('resize-observer-polyfill')
+const ResizeObserver = require('resize-observer-polyfill').default || require('resize-observer-polyfill')
 const { defaultTabIcon } = require('./components/icons')
 
 // Some code for managing focus was adopted from https://github.com/ghosh/micromodal