v3.1.0

• Send wikitext to the current MediaWiki parse API with POST instead of URL-limited GET requests.
• Add bounded HTTP requests, validated user agents, injectable transport, trusted endpoint selection, and page-title context.
• Report HTTP, JSON, MediaWiki API, and malformed-response failures explicitly.
• Move the default cache from vendor to the system temporary directory and add TTL and disable controls.
• Validate output formats and improve whitespace-preserving plain-text conversion.
• Add the WikitextParser class alias used by earlier documentation and fully correct the README.
• Accept DO File Cache PSR-6 v4 alongside v3 and remove the unused DOM extension requirement.
• Add passing PHP 7.1 and PHP 8.5 tests.