3.0.0

• Changed autoload from PSR-0 to PSR-4
• v3 now supports Symfony 4.4+ and Symfony 5.0+
• Uses version ~2.8 of mixpanel/mixpanel-php
• Using the autowiring
• Remove compatibility with old Symfony versions not maintained
• Setting up Travis + Php-cs Fixer
• Add auto_update_user parameter in order to send user data on each request
• Add enable parameter in order to enable/disable send data to Mixpanel
• Add extra_data config to send more user data
• Create MixpanelEvent if you want to send data without annotation
• Be able to use Expression in props

  /*
   * @Mixpanel\Track("Order Completed", props={
   *      "user": @Mixpanel\Expression("user.getId()")
   * })
   */

• Some fixes (event name, getId not exist, ...)
• Update Readme