PHP 8.4 deprecation notices: "Implicitly marking parameter $xxx as nullable is deprecated"

[heldchen]

A clear and concise description of what the bug is.

Pre-requisites

1. lastest stable composer
2. latest vaimo/composer-patches
3. php 8.4

To Reproduce

$ ./composer.phar info vaimo/composer-patches
Deprecation Notice: Vaimo\ComposerPatches\Factories\BootstrapFactory::create(): Implicitly marking parameter $listResolver as nullable is deprecated, the explicit nullable type must be used instead in /srv/projects/php/php-core/src/lib/vendor/vaimo/composer-patches/src/Factories/BootstrapFactory.php:37
Deprecation Notice: Vaimo\ComposerPatches\Factories\BootstrapFactory::create(): Implicitly marking parameter $outputStrategy as nullable is deprecated, the explicit nullable type must be used instead in /srv/projects/php/php-core/src/lib/vendor/vaimo/composer-patches/src/Factories/BootstrapFactory.php:37
Deprecation Notice: Vaimo\ComposerPatches\Bootstrap::__construct(): Implicitly marking parameter $listResolver as nullable is deprecated, the explicit nullable type must be used instead in /srv/projects/php/php-core/src/lib/vendor/vaimo/composer-patches/src/Bootstrap.php:63
Deprecation Notice: Vaimo\ComposerPatches\Bootstrap::__construct(): Implicitly marking parameter $outputStrategy as nullable is deprecated, the explicit nullable type must be used instead in /srv/projects/php/php-core/src/lib/vendor/vaimo/composer-patches/src/Bootstrap.php:63
name     : vaimo/composer-patches
descrip. : Applies a patch from a local or remote file to any package that is part of a given composer project. Patches can be defined both on project and on package level. Optional support for patch versioning, sequencing, custom patch applier configuration and patch command for testing/troubleshooting added patches.
keywords : Fixes, back-ports, backports, bulk patches, bundled patches, composer command, composer plugin, configurable patch applier, development patches, downloaded patches, environment flags, hot-fixes, hotfixes, indirect restrictions, maintenance, maintenance tools, multi-version patches, multiple formats, os-specific config, package bug-fix, package patches, patch branching, patch command, patch description, patch exclusion, patch header, patch meta-data, patch resolve, patch search, patch skipping, patcher, patching, plugin, remote patch files, resolve patches, skipped packages, tools, utilities, utility, utils, version restriction
versions : * 5.2.0
released : 2024-04-18, 8 months ago
type     : composer-plugin
license  : MIT License (MIT) (OSI approved) https://spdx.org/licenses/MIT.html#licenseText
homepage : 
source   : [git] https://github.com/vaimo/composer-patches.git ad249f8851902a71f0bdd2f03a89bb8956049ec5
dist     : [zip] https://api.github.com/repos/vaimo/composer-patches/zipball/ad249f8851902a71f0bdd2f03a89bb8956049ec5 ad249f8851902a71f0bdd2f03a89bb8956049ec5
path     : /srv/projects/php/php-core/src/lib/vendor/vaimo/composer-patches
names    : vaimo/composer-patches

support
docs : https://github.com/vaimo/composer-patches
issues : https://github.com/vaimo/composer-patches/issues
source : https://github.com/vaimo/composer-patches

autoload
psr-4
Vaimo\ComposerPatches\ => src

requires
composer-plugin-api ^1.0 || ^2.0
composer-runtime-api ^1.0 || ^2.0
ext-json *
loophp/phposinfo ^1.6
php >=7.0.0
seld/jsonlint ^1.7.1
vaimo/topological-sort ^1.0

requires (dev)
composer/composer ^1.0 || ^2.0
phpcompatibility/php-compatibility >=9.1.1
phpmd/phpmd >=2.6.0
sebastian/phpcpd >=1.4.3
squizlabs/php_codesniffer >=2.9.2
vaimo/composer-changelogs ^1.0.0
vaimo/composer-patches-proxy 1.0.0

conflicts
cweagans/composer-patches *

Expected
no deprecation notices are outputted

Actual
5 deprecation notices are outputted

Notes
null-able parameters must be marked explicitly if they have a type defined.
for example ListResolver $listResolver = null must be updated to ListResolver|null $listResolver = null or ?ListResolver $listResolver = null

[heldchen]

in phpstorm, I used this in "Replace in files" for my custom code to find single-line functions that need updating:

from: ((, |\()(?![^, ]*(\?|null|mixed)[^, ]*)[^, ]+) (\$[^ ,\n]+ = null) (with regex-option active)
to: $1|null $4