For current tag php is 7.1.11 is possible (#994)

* for current tag php is 7.1.11 is possible

Author: bscheshirwork

composer.json

@@ -18,6 +18,7 @@
     ],
     "minimum-stability": "dev",
     "require": {
+        "php": ">=5.4.0 <7.1.12",
         "yiisoft/yii2": "^2.0.0",
         "yiisoft/yii2-swiftmailer": "^2.0.0",
         "yiisoft/yii2-authclient": "^2.1.0",