wp_mock ^0.4.2 -> ^0.5

 - rm'd composer.lock & ran composer install to update dependencies

Author: leonstafford

composer.json

@@ -39,7 +39,7 @@
         "wp-coding-standards/wpcs": "*",
         "phpcompatibility/php-compatibility": "*",
         "php-parallel-lint/php-parallel-lint": "*",
-        "10up/wp_mock": "^0.4.2",
+        "10up/wp_mock": "^0.5",
         "mikey179/vfsstream": "^1.6"
     },
     "autoload": {