Merge branch 'tests' into dev-2.0

Author: unclead

.gitignore

@@ -1,2 +1,3 @@
 .idea/*
-/node_modules
+node_modules/
+vendor/

composer.json

@@ -25,6 +25,9 @@
         "php": ">=5.4.0",
         "yiisoft/yii2": "*"
     },
+    "require-dev": {
+        "phpunit/phpunit": "5.4.*"
+    },
     "autoload": {
         "psr-4": {
           "yii\\multipleinput\\examples\\": "examples/",