Update composer.json

Author: jsirish

composer.json

@@ -15,10 +15,10 @@
     "license": "BSD-3-Clause",
     "require": {
         "silverstripe/recipe-cms": "^1.0 || ^4.0",
-        "silverstripe/vendor-plugin": "^1.0"
+        "silverstripe/vendor-plugin": "^1.0 || ^2.0"
     },
     "require-dev": {
-        "phpunit/PHPUnit": "^5.7",
+        "phpunit/phpunit": "^5.7",
         "squizlabs/php_codesniffer": "*"
     },
     "autoload": {