v0.2.0: Allow to use with Symfony 5. (#4)

* Allow to use with Symfony 5.

* Remove composer.lock for Travis builds.

* Do not test for nightly PHP version.

* PHP version bumped to 7.3.

* Do not test for PHP 7.2.

* Allow to use with PHP 7.3.

v0.1.3

SQLite extension moved to dev dependencies.

v0.1.2

Test for PHP 7.3 as well.

v0.1.1

PHPStan anlysis level increased.

v0.1.0

Initial commit.