Export auth functions (#6)

Author: laurenzlong

src/features.ts

@@ -1,5 +1,6 @@
 import { makeChange, wrap, mockConfig } from './main';
 import * as analytics from './providers/analytics';
+import * as auth from './providers/auth';
 import * as crashlytics from './providers/crashlytics';
 import * as database from './providers/database';
 import * as firestore from './providers/firestore';
@@ -11,6 +12,7 @@ export interface FeaturesList {
   wrap: typeof wrap;
   makeChange: typeof makeChange;
   analytics: typeof analytics;
+  auth: typeof auth;
   crashlytics: typeof crashlytics;
   database: typeof database;
   firestore: typeof firestore;
@@ -23,6 +25,7 @@ export const features: FeaturesList = {
   wrap,
   makeChange,
   analytics,
+  auth,
   crashlytics,
   database,
   firestore,