Yii HTTP Runner 3.0

Major version of Yii HTTP Runner were tagged. In this version made several changes.

• Added ability to change the size of the buffer to send the content of the message body.
• Allowed to use any PSR logger, NullLogger by default.
• Removed ServerRequestFactory .
• Mark SapiEmitter as internal.
• Fixed incorrect handling response that did not close its own output buffers.