Update README and composer tags for CakePHP 4

Author: bcrowe

README.md

@@ -7,7 +7,7 @@
 [![Quality Score][ico-code-quality]][link-code-quality]
 [![Total Downloads][ico-downloads]][link-downloads]
 
-This is a simple component for CakePHP 3 which injects pagination information
+This is a simple component for CakePHP 4 which injects pagination information
 from CakePHP's Paginator into serialized JsonView and XmlView responses.
 
 ## Install

composer.json

@@ -3,7 +3,7 @@
     "description": "CakePHP 4 plugin that injects pagination information into API responses.",
     "type": "cakephp-plugin",
     "keywords": [
-        "cakephp", "api", "pagination", "cakephp3"
+        "cakephp", "api", "pagination", "cakephp3", "cakephp4"
     ],
     "homepage": "https://github.com/bcrowe/cakephp-api-pagination",
     "license": "MIT",