Include migration script for 3.8 into travis

.travis.yml

@@ -99,6 +99,7 @@ script:
  - php upgrade.php 3.6.0 3.7.0 >> upgrade.log
 # - cat upgrade360370.log
  - php upgrade2.php 3.6.0 3.7.0 >> upgrade2.log
+ - php upgrade.php 3.7.0 3.8.0 >> upgrade.log
  - php upgrade2.php 3.7.0 3.8.0 >> upgrade2.log
 # - cat upgrade2.log
  - cd ../..