Update custom-fastboot-app to use current version

Author: Robert Jackson

test-packages/custom-fastboot-app/package.json

@@ -35,7 +35,7 @@
     "ember-cli-app-version": "^3.2.0",
     "ember-cli-babel": "^7.20.5",
     "ember-cli-dependency-checker": "^3.2.0",
-    "ember-cli-fastboot": "3.0.0-beta.2",
+    "ember-cli-fastboot": "3.2.0-beta.1",
     "ember-cli-htmlbars": "^5.1.2",
     "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",