Add externs annotation (#4455)

hsubox76 · web-flow · commit 2ed329197dd4 · 2021-03-11T16:33:04.000-08:00
diff --git a/packages/firebase/externs/firebase-externs.js b/packages/firebase/externs/firebase-externs.js
@@ -1,3 +1,5 @@
+/** @externs */
+
 /**
  * @license Copyright 2017 Google Inc.
  *

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+/** @externs */`
	`2`	`+`
`1`	`3`	`/**`
`2`	`4`	`* @license Copyright 2017 Google Inc.`
`3`	`5`	`*`