Update dependency phpcompatibility/phpcompatibility-wp to v2.1.7

Author: renovate[bot]

composer.json

@@ -16,7 +16,7 @@
     "dealerdirect/phpcodesniffer-composer-installer": "0.6.2",
     "squizlabs/php_codesniffer": "3.5.5",
     "wp-coding-standards/wpcs": "2.3.0",
-    "phpcompatibility/phpcompatibility-wp": "2.1.0"
+    "phpcompatibility/phpcompatibility-wp": "2.1.7"
   },
   "autoload": {
     "files": [