Fix tests

Author: Torann

.travis.yml

@@ -1,11 +1,13 @@
 language: php
 
 php:
-  - 5.5
   - 5.6
+  - 7.1
+  - 7.2
+  - 7.3
 
 before_script:
   - curl -s http://getcomposer.org/installer | php
   - php composer.phar install --dev
 
-script: phpunit
+script: php ./vendor/bin/phpunit

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
+        "php": ">=5.6",
         "illuminate/support": "~5.0|~6.0",
         "hashids/hashids": "1.0.6"
     },