Merge pull request #237 from lerminou/master

add twig 3 support

Author: excelwebzone

composer.json

@@ -21,7 +21,7 @@
     "symfony/framework-bundle": "^2.8 || ^3.0 || ^4.0 || ^5.0",
     "symfony/security-bundle": "^2.8 || ^3.0 || ^4.0 || ^5.0",
     "symfony/validator": "^2.8 || ^3.0 || ^4.0 || ^5.0",
-    "twig/twig": "^1.40 || ^2.9"
+    "twig/twig": "^1.40 || ^2.9 || ^3.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^5 || ^6 || ^7"