allow symfony 4.0, drop older php versionsÄ

Author: ElectricMaxxx

.travis.yml

@@ -1,8 +1,6 @@
 language: php
 
 php:
-  - 5.6
-  - 7.0
   - 7.1
   - 7.2
 
@@ -13,7 +11,7 @@ sudo: false
 
 matrix:
   include:
-    - php: 5.6
+    - php: 7.1
       env: PACKAGE_VERSION=low
     - php: hhvm
       dist: trusty

composer.json

@@ -27,9 +27,9 @@
         }
     ],
     "require": {
-        "php": "^5.6|^7.0",
+        "php": "^7.1",
         "phpcr/phpcr": "~2.1.0",
-        "symfony/console": "~2.3|~3.0"
+        "symfony/console": "~2.3|~3.0|^4.0"
     },
     "require-dev": {
         "ramsey/uuid": "^3.5",