Update symfony packages - autoclosed

This MR contains the following updates:

Package	Type	Update	Change
symfony/console (source)	require	patch	4.4.47 -> 4.4.49
symfony/flex	require	patch	1.19.3 -> 1.19.4
symfony/framework-bundle (source)	require	patch	4.4.47 -> 4.4.49
symfony/maker-bundle (source)	require-dev	minor	v1.39.1 -> v1.48.0
symfony/phpunit-bridge (source)	require-dev	patch	4.4.47 -> 4.4.49
symfony/polyfill-apcu (source)	require	minor	1.26.0 -> 1.27.0

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