Move ext-mysqli to require-dev (#352)

Author: marmichalski

composer.json

@@ -4,12 +4,12 @@
 	"license": "MIT",
 	"require": {
 		"php": "^8.0",
-		"ext-mysqli": "*",
 		"composer-runtime-api": "^2.0",
 		"composer/semver": "^3.2",
 		"phpstan/phpstan": "^1.2"
 	},
 	"require-dev": {
+		"ext-mysqli": "*",
 		"ext-pdo": "*",
 		"doctrine/dbal": "^3.2",
 		"friendsofphp/php-cs-fixer": "3.4.0",