lets use 7.0 for builds by default

Author: lsmith77

.travis.yml

@@ -2,6 +2,7 @@ language: php
 
 php:
   - 5.4
+  - 5.5
   - 5.6
   - 7.0
   - hhvm
@@ -22,13 +23,13 @@ matrix:
   include:
     - php: 5.3
       env: COMPOSER_FLAGS="--prefer-lowest" SYMFONY_DEPRECATIONS_HELPER=weak
-    - php: 5.5
+    - php: 7.0
       env: SYMFONY_VERSION='2.3.* symfony/expression-language:2.4.*' SYMFONY_DEPRECATIONS_HELPER=weak
-    - php: 5.5
+    - php: 7.0
       env: SYMFONY_VERSION=2.6.*
-    - php: 5.5
+    - php: 7.0
       env: SYMFONY_VERSION=2.7.*
-    - php: 5.5
+    - php: 7.0
       env: SYMFONY_VERSION=2.8.*
 
 before_install: