Tweak travis and appveyor for Symfony 4

nicolas-grekas · nicolas-grekas · commit 732f6fef0a08 · 2017-05-18T15:50:33.000+02:00
diff --git a/composer.json b/composer.json
@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": "^7.1.3",
-        "symfony/options-resolver": "~2.8|~3.0|~4.0",
+        "symfony/options-resolver": "~3.4|~4.0",
         "ext-ldap": "*"
     },
     "autoload": {
