Merge pull request #37 from oleg-andreyev/drop-php-53-force-phpunit-less-8

Dropping support of 5.3 and forcing phpunit < 8

Author: aik099

composer.json

@@ -18,11 +18,10 @@
     ],
 
     "require": {
-        "php": ">=5.3.1",
+        "php": ">=5.4",
         "behat/mink":  "~1.7",
-        "symfony/phpunit-bridge": "^4.0"
+        "symfony/phpunit-bridge": "^4.2"
     },
-
     "require-dev": {
         "symfony/http-kernel": "^2.7 || ^3.2 || ^4.0"
     },