update heroku stack

mansona · mansona · commit 1b727b8306dd · 2021-03-18T14:26:53.000Z
diff --git a/app.json b/app.json
@@ -38,5 +38,5 @@
   "name": "fastboot-website",
   "scripts": {
   },
-  "stack": "cedar-14"
+  "stack": "heroku-20"
 }
