Add PHP 8.5 and Composer 2.9 support

[Soean]

Description

Adds PHP 8.5 and Composer 2.9 support

How has this been tested?

• PHP 8.5 and Composer 2.9 were added to the github workflows tests.
• Tested local.

Types of changes

src/Step/Steps.php
Fixes PHP 8.5 deprecation

Method SplObjectStorage::attach() is deprecated since 8.5, use method SplObjectStorage::offsetSet() instead, in wecodemore/wpstarter/src/Step/Steps.php line 109.

‎src/Util/DbChecker.php
Fixes PHPStan error

Left side of and is always false.
🪪 logicalAnd.leftAlwaysFalse

src/Util/Paths.php‎
Fixes PHPStan error / PHP 8.5 deprecation

Possibly invalid array key type string|null.

Deprecated: Using null as an array offset is deprecated, use an empty string instead

composer.json

• Root composer.json requires composer/composer ~2.3.0, found composer/composer[2.3.0, ..., 2.3.10] but these were not loaded, because they are affected by security advisories. To ignore the advisories, add ("PKSA-b8f7-zn44-r4gz", "PKSA-s25b-vbmp-jvhh", "PKSA-jn72-4kr8-gj3h", "PKSA-m1ph-vmbx-2xd3") to the audit "ignore" config. To turn the feature off entirely, you can set "block-insecure" to false in your "audit" config.

Issues

Fixes #144

[gmazzap]

Just one thing, IIUC instead of blocking unsecure packages we could remove support for Composer 2.3, right?

[gmazzap]

Ah, and thank you fro your work @Soean!

[Soean]

It works with Composer >=2.7. So we have to remove Composer 2.3 - 2.6 support.