Yii2 REDIS version 2.1.1 was released. In this version:

• Fixed PHP 7.4 compatibility.
• Prevented an infinite loop in parseResponse() when fread() returns an empty string on a broken socket.
• Fixed fwrite(): supplied resource is not a valid stream.
• Removed PHP 7.3 support to align with Yii2 minimum PHP version.
• Added static analysis with PHPStan.
• Applied Yii2 coding standards.
• Bumped predis/predis to version 3.4.
• Updated PHP and Yii2 dependencies in composer.json, and refreshed CHANGELOG.md.