Using PHP 5.5 version test at least

Author: peter279k

.travis.yml

@@ -1,14 +1,16 @@
 language: php
 
+dist: trusty
+
 matrix:
   include:
-  - php: 5.4
   - php: 5.5
   - php: 5.6
   - php: 7.0
   - php: 7.1
   - php: 7.2
   - php: 7.3
+  - php: 7.4
 
 sudo: false