Drop support for Symfony 3.0

Author: matthiasnoback

.travis.yml

@@ -2,11 +2,9 @@ language: php
 
 matrix:
   include:
-    - php: 7.0
-      env: SYMFONY_VERSION=3.0.*
     - php: 7.0
       env: SYMFONY_VERSION=3.4.*
-    - php: 7.1
+    - php: 7.2
       env: SYMFONY_VERSION=4.0.*
 
 before_install:

composer.json

@@ -24,18 +24,18 @@
     },
     "require": {
         "php": ">=7.0",
-        "symfony/form": "~3.0|~4.0",
-        "symfony/console": "~3.0|~4.0",
-        "symfony/translation": "~3.0|~4.0"
+        "symfony/form": "~3.4|~4.0",
+        "symfony/console": "~3.4|~4.0",
+        "symfony/translation": "~3.4|~4.0"
     },
     "require-dev": {
         "beberlei/assert": "~2.1",
         "behat/behat": "~3.0",
         "friendsofphp/php-cs-fixer": "^1.10|^2.2",
-        "symfony/finder": "~3.0|~4.0",
-        "symfony/framework-bundle": "~3.0|~4.0",
-        "symfony/validator": "~3.0|~4.0",
-        "symfony/yaml": "~3.0|~4.0",
-        "symfony/security": "~3.0|~4.0"
+        "symfony/finder": "~3.4|~4.0",
+        "symfony/framework-bundle": "~3.4|~4.0",
+        "symfony/validator": "~3.4|~4.0",
+        "symfony/yaml": "~3.4|~4.0",
+        "symfony/security": "~3.4|~4.0"
     }
 }