Log targets major releases

Several log target packages got a major releases.

Yii Logging Email Target 4.0

Configuration group names adapted to Yii convention and make a few improvements:

• in EmailTarget type hints moved from phpdoc to constructor signature;
• added support of yiisoft/mailer version ^4.0|^5.0 .

Yii Logging File Target 3.0

Configuration group names adapted to Yii convention.

Yii Logging Syslog Target 2.0

Configuration group names adapted to Yii convention.