Bump nikic/php-parser from 4.2.1 to 4.3.0

Bumps [nikic/php-parser](https://github.com/nikic/PHP-Parser) from 4.2.1 to 4.3.0.
- [Release notes](https://github.com/nikic/PHP-Parser/releases)
- [Changelog](https://github.com/nikic/PHP-Parser/blob/master/CHANGELOG.md)
- [Commits](nikic/PHP-Parser@v4.2.1...v4.3.0)

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