Merge pull request #210 from ember-cli/ef4-patch-1

Options are optional

Author: NullVoxPopuli

index.d.ts

@@ -1,6 +1,6 @@
-export default function setupDeprecationWorkflow(config: {
-  throwOnUnhandled: boolean;
-  workflow: {
+export default function setupDeprecationWorkflow(config?: {
+  throwOnUnhandled?: boolean;
+  workflow?: {
     handler: 'log' | 'silence' | 'throw';
     matchId: string;
     matchMessage: string;