* 2.6.3 (2017-07-22)

 * fixed compat with Symfony 3.3+

* 2.6.2 (2017-05-22)

 * fixed Swiftmailer dependency

* 2.6.1 (2017-05-20)

 * reverted support for Swiftmailer 6.0

* 2.6.0 (2017-05-19)

 * added compatibility with Swiftmailer 6.0

* 2.5.4 (2017-03-21)

 * fixed for "Swiftmailer still sends email if exception is thrown"
 * added autowiring aliases

* 2.5.3 (2017-03-02)

 * fixed SMTP usage without request context

* 2.5.2 (2017-03-02)

 * fixed deprecated mail transport

* 2.5.1 (2017-03-01)

 * fixed disabling delivery with env vars config

* 2.5.0 (2017-02-23)

 * allow using env variables in transport configuration

* 2.4.2 (2016-12-20)

 * fixed compatibility with Symfony 3.3

* 2.4.1 (2016-12-20)

 * added missing attachments in the web profiler

* 2.4.0 (2016-10-09)

 * added support for setLocalDomain() and setStreamOptions()
 * updated the styles of the SwiftMailer commands
 * removed support for deprecated versions of Symfony
 * added support for LoadBalancedTransport in SendEmailCommand
 * fixed messagePart.charset not defined in the web profiler
 * fixed performance on Symfony 3 (IntrospectableContainerInterface does not exist anymore)
 * allowed empty transport configs
 * added a priority flag on plugins tag
