Merge pull request #58 from eugene-matvejev/udpate_travis_config

RC8 - update travis env. config

Author: Eugene Matvejev

.travis.yml

@@ -1,7 +1,8 @@
 language: "php"
 php:
+    - "5.5"
     - "5.6"
-    - "7.0.4"
+    - "7.0"
     - "hhvm"
 
 before_script:

composer.json

@@ -35,6 +35,6 @@
     },
     "require-dev": {
         "composer/composer": "^1.1",
-        "phpunit/phpunit": "^5.3"
+        "phpunit/phpunit": "^4.8 || ^5.3"
     }
 }