Add support for Symfony 4.4, update project dependencies, update test…#259

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DaanBiesterbos wants to merge 2 commits intoschmittjoh:masterfrom DaanBiesterbos:feature/support-symfony-4-fix-deprecation-errors-and-update-dependencies

+4,254-2,499

Commits on Mar 11, 2021

Add support for Symfony 4.4, update project dependencies, update tests, fix deprecation errors, php7.3+
Daan Biesterbos
committed
Update travis and fix warnings in build
Daan Biesterbos
committed