Merge branch 'symfony4' of https://github.com/VolCh/symfony-console-completion into VolCh-phpunit6

Author: stecman

.travis.yml

@@ -9,9 +9,13 @@ matrix:
     - php: 7.0
     - php: 7.1
     - php: 7.2
+    - php: nightly
     - php: hhvm
       env: COMPOSER_OPTS="--prefer-lowest"
 
+  allow_failures:
+    - php: nightly
+
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -y bash zsh

composer.json

@@ -10,7 +10,7 @@
     ],
     "require": {
         "php": ">=5.3.2",
-        "symfony/console": "~2.3 || ~3.0"
+        "symfony/console": "~2.3 || ~3.0 || ~4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4.8.36 || ~5.7 || ~6.4"