zephir_parser: Changelog

Version Message
1.4.2 ### Added
- Enabled support of PHP8.1 for PECL [#116](https://github.com/phalcon/php-zephir-parser/issues/116)
1.4.1 Sat, Sep 18, 2021 - Zephir Parser 1.4.1

= Changes:

- Fixed issue #125: Renamed extension name from `Zephir Parser` to `zephir_parser`
1.4.0 Sat, Sep 18, 2021 - Zephir Parser 1.4.0

= New features:

- Fixed issue #120: Add support for `mixed` type
- Fixed issue #118: Add support for `yield` statement