add .prettierrc

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "arrowParens": "always",
+  "bracketSpacing": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "useTabs": true
+}

src/data.ts

@@ -0,0 +1 @@
+let users: Record<string, Carpool.User> = {};

src/types.ts

@@ -1,24 +1,24 @@
 namespace Carpool {
-	interface Group {
+	export interface Group {
 		id: string;
 		member_ids: string[];
 	}
 
-	interface User {
+	export interface User {
 		id: string;
 		first_name: string;
 		last_name: string;
 	}
 
-	interface Comment {
+	export interface Comment {
 		id: string;
 		body: string;
 		author_id: string;
 	}
 
-	type Status = "pending" | "cancelled" | "completed" | "interrupted";
+	export type Status = "pending" | "cancelled" | "completed" | "interrupted";
 
-	interface Post {
+	export interface Post {
 		id: string;
 		title: string;
 		description: string;