[FirebaseUI] Update travis build script.

Author: yramanchuk

.travis.yml

@@ -8,7 +8,7 @@ cache:
 
 rvm: 2.3.1
 before_install:
-  - open -a "simulator" --args -CurrentDeviceUDID 1FC0DC01-6B14-4A81-9F05-E337EEDC11B2
+  - open -a "simulator" --args -CurrentDeviceUDID F60B87EC-8969-41A7-90ED-D0826ECC32DB
   - bundle install
   - gem install xcpretty
   - bundle exec pod install --repo-update