Set tsify target to ES3

bin/endtoend-build-tests

@@ -32,5 +32,5 @@ pushd "${__root}/test/endtoend/typescript"
   mkdir -p dist
   cp "${__root}/packages/uppy/dist/uppy.min.css" dist/
   cp index.html dist/
-  browserify main.ts -p tsify -o dist/bundle.js
+  browserify main.ts -p [ tsify --target ES3 ] -o dist/bundle.js
 popd

test/endtoend/typescript/main.ts

@@ -8,12 +8,6 @@ import Webcam = require('@uppy/webcam')
 import Tus = require('@uppy/tus')
 import Form = require('@uppy/form')
 
-window.onerror = (err) => {
-  const el = document.createElement('p') as HTMLParagraphElement
-  el.textContent = err.stack
-  document.body.appendChild(el)
-}
-
 const TUS_ENDPOINT = 'https://master.tus.io/files/'
 
 const uppy = Uppy({