Updated travis config (#90)

* Test on symfony 4

* sort packages

* Fixed tests

* Removed debug code

* Adding doctrine annotations and force new versions of PHPUnut

* typo

* Better deps

* Bugfix

* serializer-bundle does not exists =)

* cs

* Better specify versions

* Test fix on sf2.7

* minor

* cs

Changing type

Update Changelog.md

prepare for 1.0.1 (#83)

Prepare for 1.0.0 (#81)

Marked classes as internal (#72)

* Marked some classes as internal

* Added changelog

* minor

Updating session handler is breaking old cache.

Updated dependencies to avoid bug in underlying libraries. (#64)

Added changelog (#61)

Merge pull request #54 from php-cache/logo

Added logo in toolbar