ci: bump minimum PHP version from 5.4 to 7.4

WPCS 3.3.0 and its develop branch now require PHP 7.2+, making the
existing PHP 5.4–7.1 CI matrix entries unable to install dev
dependencies. Since the VIP platform requires PHP 8.3 and consuming
plugins typically require 7.4+, raising the minimum to 7.4 aligns
VIPCS with its actual usage whilst keeping the dev dependency early
warning system functional.

Author: GaryJones

.github/workflows/quicktest.yml

@@ -26,9 +26,9 @@ jobs:
     strategy:
       matrix:
         include:
-          - php: '5.4'
+          - php: '7.4'
             dependencies: 'stable'
-          - php: '5.4'
+          - php: '7.4'
             dependencies: 'lowest'
 
           - php: 'latest'

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
 
     strategy:
       matrix:
-        php: ['5.4', 'latest', '8.5']
+        php: ['7.4', 'latest', '8.5']
 
     name: "Lint: PHP ${{ matrix.php }}"
     continue-on-error: ${{ matrix.php == '8.5' }}
@@ -64,20 +64,13 @@ jobs:
       # - php: The PHP versions to test against.
       # - dependencies: The PHPCS dependencies versions to test against.
       #   IMPORTANT: test runs shouldn't fail because of PHPCS being incompatible with a PHP version.
-      #   - PHPCS will run without errors on PHP 5.4 - 7.4 on any supported version.
-      #   - PHP 8.0 needs PHPCS 3.5.7+ to run without errors, and we require a higher minimum version.
-      #   - PHP 8.1 needs PHPCS 3.6.1+ to run without errors, but works best with 3.7.1+, and we require at least this minimum version.
       #   - PHP 8.2, 8.3 and 8.4 need PHPCS 3.8.0+ to run without errors (though the errors don't affect the tests).
       matrix:
-        php: ['5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         dependencies: ['lowest', 'stable']
 
         include:
           # Test against dev versions of all dependencies with select PHP versions for early detection of issues.
-          - php: '5.4'
-            dependencies: 'dev'
-          - php: '7.0'
-            dependencies: 'dev'
           - php: '7.4'
             dependencies: 'dev'
           - php: '8.4'

composer.json

@@ -16,7 +16,7 @@
 		}
 	],
 	"require": {
-		"php": ">=5.4",
+		"php": ">=7.4",
 		"phpcsstandards/phpcsextra": "^1.4.0",
 		"phpcsstandards/phpcsutils": "^1.1.0",
 		"sirbrillig/phpcs-variable-analysis": "^2.12.0",
@@ -28,7 +28,7 @@
 		"php-parallel-lint/php-console-highlighter": "^1.0.0",
 		"phpcompatibility/php-compatibility": "^9",
 		"phpcsstandards/phpcsdevtools": "^1.2.3",
-		"phpunit/phpunit": "^4 || ^5 || ^6 || ^7 || ^8 || ^9"
+		"phpunit/phpunit": "^8 || ^9"
 	},
 	"config": {
 		"allow-plugins": {