test php7 and php5.6

.gitlab-ci.yml

-image: "iras/php7-alpine"
-
-test:
+test:7.0:
+  image: "iras/php7-fpm"
   artifacts:
     paths:
     - coverage/
   script:
+    - wget http://getcomposer.org/installer -O - | php -- --install-dir=/usr/local/bin --filename=composer
     - composer install
     - composer test-wcc
+
+test:5.6:
+  image: "iras/php5-fpm"
+  script:
+    - wget http://getcomposer.org/installer -O - | php -- --install-dir=/usr/local/bin --filename=composer
+    - composer install
+    - composer test