Jh expose app (#400)

* exposes app

* actually expose app

* changelog

Author: joehan

changelog.txt

@@ -1 +1,2 @@
+feature - Adds functions.app() api to access the app instance used by functions
 fixed - improved types of the `Change` class to describe both `before` and `after` fields as non-optional

src/apps.ts

@@ -24,7 +24,6 @@ import * as _ from 'lodash';
 import * as firebase from 'firebase-admin';
 import { firebaseConfig } from './config';
 
-/** @internal */
 export function apps(): apps.Apps {
   if (typeof apps.singleton === 'undefined') {
     apps.init();

src/index.ts

@@ -24,6 +24,7 @@
 import * as analytics from './providers/analytics';
 import * as auth from './providers/auth';
 
+import * as apps from './apps';
 import * as crashlytics from './providers/crashlytics';
 import * as database from './providers/database';
 import * as firestore from './providers/firestore';
@@ -32,9 +33,11 @@ import * as pubsub from './providers/pubsub';
 import * as remoteConfig from './providers/remoteConfig';
 import * as storage from './providers/storage';
 import { firebaseConfig } from './config';
+var app = apps.apps();
 
 export {
   analytics,
+  app,
   auth,
   crashlytics,
   database,