Update dependabot config to use grouping (#444)

* Update dependabot config to use grouping for easier maintenance

* Include PHPUnit polyfills

* Update PHPunit and polyfills for compatibility

Author: Sephsekla

.github/dependabot.yml

@@ -12,6 +12,12 @@ updates:
           prefix: 'Composer'
       allow:
           - dependency-type: 'direct'
+      groups:
+          phpunit:
+              patterns:
+                  - 'phpunit/phpunit'
+                  - 'wp-phpunit/wp-phpunit'
+                  - 'yoast/phpunit-polyfills'
 
     - package-ecosystem: 'npm'
       directory: '/'
@@ -26,3 +32,7 @@ updates:
           - dependency-type: 'direct'
           - dependency-name: '@wordpress/*'
             dependency-type: 'all'
+      groups:
+          wordpress:
+              patterns:
+                  - '@wordpress/*'

composer.json

@@ -7,7 +7,7 @@
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9.6",
-		"yoast/phpunit-polyfills": "1.0.5",
+		"yoast/phpunit-polyfills": "^1.1",
 		"dealerdirect/phpcodesniffer-composer-installer": "^1.0",
 		"wp-coding-standards/wpcs": "^2.3",
 		"wp-phpunit/wp-phpunit": "^6.2",