Merge pull request #111 from heavysixer/yarn_upgrade

Bump dependency versions

Author: jboler

package.json

@@ -51,7 +51,7 @@
     "presentations"
   ],
   "dependencies": {
-    "async": "^1.5.2",
+    "async": "^2.6.4",
     "image-size": "^0.6.2",
     "jszip": "^3.1.5",
     "request": "^2.83.0",