Ready for 3.8.1 release

Prepare for 3.8.0 release

v3.7.0

Added:
  * [Behat#1236](Behat#1236): Add support for php 7.4 ([@snapshotpl](https://github.com/snapshotpl))

Fixed:
  * [Behat#1270](Behat#1270): Fix issues with PHP version handling in build ([@Sam-Burns](https://github.com/Sam-Burns))
  * [Behat#1282](Behat#1282): Updated the year on Changelog dates ([@choult](https://github.com/choult))
  * [Behat#1284](Behat#1284): Restore PHP 5.3/5.4 compat ([@dvdoug](https://github.com/dvdoug), [@Sam-Burns](https://github.com/Sam-Burns), [@pamil](https://github.com/pamil))

Changed:
  * [Behat#1281](Behat#1281): Make container-interop/container-interop optional dependency ([@upyx](https://github.com/upyx))

Merge pull request Behat#1275 from Daniel-Marynicz/master

fix php 7.1 deprecation for ReflectionType::__toString

Update version number for 3.6.0

Change the date of release

Bump application version

Bump application version

Bump application version

Bump Application version