Merge pull request #5975 from cakephp/3.0-php7

Add PHP7 to travis build

.travis.yml

@@ -4,6 +4,7 @@ php:
   - 5.4
   - 5.5
   - 5.6
+  - 7.0
 
 sudo: false
 
@@ -25,6 +26,8 @@ matrix:
       env: HHVM=1 DB=sqlite db_dsn='sqlite:///:memory:'
     - php: hhvm-nightly
       env: HHVM=1 DB=mysql db_dsn='mysql://travis@0.0.0.0/cakephp_test'
+  allow_failures:
+    - php: 7.0
 
 before_script:
   - composer self-update