Version number 3.0.0

Change-Id: I5dd0570c24b96f18f628d80cbb3f78c9eb59ab3c

Author: samtstern

constants.gradle

@@ -1,7 +1,7 @@
 project.ext {
     submodules = ['database', 'auth', 'storage', 'firestore']
     group = 'com.firebaseui'
-    version = '3.0.0-SNAPSHOT'
+    version = '3.0.0'
     pomdesc = 'Firebase UI Android'
 
     compileSdk = 26