Restore support for Symfony 4.4 LTS

[ajgarlag]

This PR restores support for Symfony 4.4 LTS in master branch.

Fix #81

[coveralls]

Pull Request Test Coverage Report for Build 215

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 99.163%

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Totals
Change from base Build 194:	0.0%
Covered Lines:	474
Relevant Lines:	478

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💛 - Coveralls

[migo315]

Sorry for the delay. I tested it and it worked like a charm.

Thanks for your contribution :-)