Target PHP 8.2 and above, and upgrade PHPUnit to version 9 (#741)

Update CI, Composer, and PHPUnit configuration.

Remove the Maker bundle, as it's not really needed now we're in
maintenanace phase and it means we don't have to upgrade a bunch
of other things to Symfony 6 or 7 right now. We can add it back
in later after the rest of the upgrade if it's still wanted.

Bug: T357844

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [ '7.4', '8.0', '8.1' ]
+        php: [ '8.2', '8.3' ]
 
     runs-on: ubuntu-latest
 

.minus-x.json

@@ -1,5 +1,5 @@
 {
 	"ignore": [
-		"./bin/.phpunit/phpunit-8.5-0/phpunit"
+		"./bin/.phpunit/phpunit-9-0/phpunit"
 	]
 }

composer.json

@@ -4,7 +4,7 @@
 	"type": "project",
 	"license": "GPL-3.0-or-later",
 	"require": {
-		"php": "^7.2|^8",
+		"php": "^8.2",
 		"ext-ctype": "*",
 		"ext-curl": "*",
 		"ext-dom": "*",
@@ -40,20 +40,18 @@
 		"mediawiki/minus-x": "^1.1",
 		"phan/phan": "^5.0",
 		"php-coveralls/php-coveralls": "^2.1",
-		"phpunit/phpunit": "^8.5",
 		"slevomat/coding-standard": "^8.0",
 		"symfony/browser-kit": "^5.4",
 		"symfony/css-selector": "^5.4",
 		"symfony/debug-bundle": "^5.4",
-		"symfony/maker-bundle": "^1.0",
-		"symfony/phpunit-bridge": "^5.4",
+		"symfony/phpunit-bridge": "^7",
 		"symfony/stopwatch": "^5.4",
 		"symfony/web-profiler-bundle": "^5.4"
 	},
 	"config": {
 		"sort-packages": true,
 		"platform": {
-			"php": "7.4"
+			"php": "8.2"
 		},
 		"allow-plugins": {
 			"dealerdirect/phpcodesniffer-composer-installer": true