added codeception to deps

composer.json

@@ -20,6 +20,7 @@
         "yiisoft/yii2-swiftmailer": "*"
     },
     "require-dev": {
+        "codeception/base": "^2.2.3",
         "codeception/verify": "*",
         "yiisoft/yii2-debug": "*",
         "yiisoft/yii2-gii": "*",