Upgrade xwp/wp-dev-lib to 1.6.5

Author: joemcgill

composer.json

@@ -16,7 +16,7 @@
     "php-coveralls/php-coveralls": "^2.1",
     "slowprog/composer-copy-file": "0.2.1",
     "wp-coding-standards/wpcs": "*",
-    "xwp/wp-dev-lib": "^1.1.1"
+    "xwp/wp-dev-lib": "^1.6.5"
   },
   "scripts": {
     "phpcs": [