Add support for Symfony 6.0

What's Changed

• Add support for Symfony ^6.0 by @jwong-dayspring in #5

Full Changelog: 5.1.0...6.0.0

5.1.0

What's Changed

• trim dependencies to the bare minimum by @jwong-dayspring in #4

Full Changelog: 5.0.0...5.1.0

Symfony 5.x and PHP 8.x compatibility

update to symfony 5 and php 8.x (#3)

* update phpunit to ^9

match symfony 4.4 website-skeleton

* remove doctrine AnnotationRegistry

* update signatures of setUp and tearDown

* add php 8.0 and 8.1 to test matrix

* remove php 7.2 and 7.3, bump minimum phpunit to 8.5

* set minimum version that supports 8.1

* update github to ubuntu-20.04

* update to symfony ^5.0

* enable annotations

Co-authored-by: Jeffrey Wong <jwong@dayspringpartners.com>

Symfony 4.x compatibility

update symfony version to ^3.4|^4.0 (#2)

* update symfony version to ^3.4|^4.0

* add github action workflow

* remove preceding "dot" in ".workflow"

* add missing ci-test script definition

* remove travis-ci

php7 and symfony3 compatibility

Update ServiceTestHelper for use with PHP 7.x and Symfony 3.x projects