Update phone validation regex to accept only numbers and correct amount - Fix "must consist of only numbers" validation error message to be specific

composer.json

@@ -16,7 +16,10 @@
   },
   "require-dev": {
     "10up/phpcs-composer": "^3.0",
-	  "sirbrillig/phpcs-changed": "^2.11"
+	  "sirbrillig/phpcs-changed": "^2.11",
+    "yoast/phpunit-polyfills": "^3.0",
+    "10up/wp_mock": "^0.4.2",
+    "phpcompatibility/php-compatibility": "dev-develop as 9.99.99"
   },
   "autoload": {
     "psr-4": {
@@ -32,6 +35,9 @@
     }
   },
   "scripts": {
-    "lint": "phpcs --standard=./phpcs.xml -p -s ."
+    "lint": "phpcs --standard=./phpcs.xml -p -s .",
+    "lint:fix": "phpcbf --standard=./phpcs.xml -p -s .",
+    "lint:compat": "phpcs --standard=./phpcs-compat.xml -p -s .",
+    "test": "vendor/bin/phpunit"
   }
 }