Update version-4-upgrade.md

ashishpatelcs · web-flow · commit 81a1e3195bf6 · 2018-10-22T00:14:07.000+05:30
diff --git a/docs/version-4-upgrade.md b/docs/version-4-upgrade.md
@@ -1,3 +1,5 @@
+# Upgrading to AngularFire2 4.0
+
 AngularFire2 4.0 is a refactor of the AngularFire2 package which implements
 @NgModule, simplifies authentication, and better supports Angular 4.
 

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+# Upgrading to AngularFire2 4.0`
	`2`	`+`
`1`	`3`	`AngularFire2 4.0 is a refactor of the AngularFire2 package which implements`
`2`	`4`	`@NgModule, simplifies authentication, and better supports Angular 4.`
`3`	`5`