Better processing of PHP version string

[asgrim]

It seems there are some times we're still not processing the PHP version string properly; someone was testing the PIE executable test builds:

$ ./pie-Linux-X64 show
🥧
 PHP Installer for Extensions (PIE) 1.4.0-asgrim-fork.2+testbuild, from The PHP Foundation
You are running a PIE Static PHP 8.5.0 build

In VersionParser.php line 191:

  Invalid version string "8.1.2-1ubuntu2.22"

for ref :

PHP 8.1.2-1ubuntu2.22 (cli) (built: Jul 15 2025 12:11:22) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.1.2, Copyright (c) Zend Technologies
    with Zend OPcache v8.1.2-1ubuntu2.22, Copyright (c), by Zend Technologies

This was using WSL with Ubuntu 22.04