update phpunit version

Author: Igor Chepurnoy

composer.json

@@ -10,20 +10,20 @@
     "license": "MIT",
     "authors": [
         {
-            "name": "Igor Chepurnoy",
-            "email": "igorzfort@gmail.com"
+            "name": "Igor Chepurnoi",
+            "email": "chepurnoi.igor@gmail.com"
         }
     ],
     "require": {
-        "yiisoft/yii2": ">=2.0.8",
+        "yiisoft/yii2": "~2.0.14",
         "yii2mod/yii2-behaviors": "*",
         "stripe/stripe-php": "~4.0",
         "nesbot/carbon": "~1.0",
         "dompdf/dompdf": "^0.8.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "~2.0",
-        "phpunit/phpunit": "~6.0"
+        "phpunit/phpunit": "~7.0"
 
     },
     "autoload": {