feat: add peerDependencies

adapters/mongo/collections/mod.ts

@@ -3,8 +3,4 @@ import { registrar as events } from "./events.ts";
 import { registrar as relations } from "./relations.ts";
 import { registrar as snapshots } from "./snapshots.ts";
 
-export const registrars: CollectionRegistrar[] = [
-  events,
-  relations,
-  snapshots,
-];
+export const registrars: CollectionRegistrar[] = [events, relations, snapshots];