Update for symfony 5 (#20)

Symfony 4 support (#18)

Resolved Symfony 3.x deprecation warnings (#15)

* Fixed error in composer.json resulting in incompatibility with Symfony 3.x

* Resolved Symfony 3.1 deprecation warnings

Merge pull request #9 from dbergunder/Fix-Configuration-Error-In-Exte…

…nsion

Fix configuration error in extension.

Add CHANGELOG.md

Merge pull request #6 from caxy/feature-insert_space_in_replace

Configuration option for inserting space in replace