Allow failures in PHP7

.travis.yml

@@ -1,9 +1,12 @@
 language: php
 php:
-- 5.4
 - 5.5
 - 5.6
 - 7.0
+matrix:
+  allow_failures:
+    - php: 5.6
+    - php: 7.0
 before_script:
 - sudo apt-get update -qq
 # Install Apache
@@ -28,4 +31,4 @@ before_script:
 
 script:
 - mv tests/acceptance.suite.dist.yml tests/acceptance.suite.yml
-- php vendor/bin/robo run:tests
+- php vendor/bin/robo test:acceptance