feat: Bump the minimum supported Symfony versions

[theofidry]

• Drop support for Symfony5.
• Only keep the LTS for Symfony6 and Symfony7.

[private-packagist]

composer.lock

Package changes

Package	Operation	From	To	About
symfony/deprecation-contracts	add	-	v3.6.0	view code - License: MIT License
symfony/filesystem	upgrade	v6.0.19	v7.4.0	diff
symfony/polyfill-ctype	upgrade	v1.28.0	v1.33.0	diff
symfony/polyfill-mbstring	upgrade	v1.28.0	v1.33.0	diff
symfony/process	upgrade	v6.0.19 ⚠️	v7.4.3 ✅	diff
symfony/yaml	upgrade	v6.0.19	v7.4.1	diff

Dev Package changes

Package	Operation	From	To	About
doctrine/instantiator	upgrade	1.5.0	2.0.0	diff
guzzlehttp/guzzle	upgrade	7.8.0	7.10.0	diff
guzzlehttp/promises	upgrade	2.0.1	2.3.0	diff
guzzlehttp/psr7	upgrade	2.6.1	2.8.0	diff
myclabs/deep-copy	upgrade	1.11.1	1.13.4	diff
nikic/php-parser	upgrade	v4.17.1	v5.7.0	diff
phar-io/manifest	upgrade	2.0.3	2.0.4	diff
php-coveralls/php-coveralls	upgrade	v2.6.0	v2.9.1	diff
phpstan/extension-installer	upgrade	1.3.1	1.4.3	diff
phpstan/phpstan	upgrade	1.10.38	1.12.32	-
phpstan/phpstan-phpunit	upgrade	1.3.15	1.4.2	diff
phpstan/phpstan-strict-rules	upgrade	1.5.1	1.6.2	diff
phpstan/phpstan-webmozart-assert	upgrade	1.2.4	1.2.11	diff
phpunit/php-code-coverage	upgrade	9.2.29	9.2.32	diff
phpunit/phpunit	upgrade	9.6.13	9.6.31	diff
psr/http-factory	upgrade	1.0.2	1.1.0	diff
psr/log	upgrade	2.0.0	3.0.2	diff
sebastian/cli-parser	upgrade	1.0.1	1.0.2	diff
sebastian/comparator	upgrade	4.0.8	4.0.9	diff
sebastian/complexity	upgrade	2.0.2	2.0.3	diff
sebastian/diff	upgrade	4.0.5	4.0.6	diff
sebastian/exporter	upgrade	4.0.5	4.0.8	diff
sebastian/global-state	upgrade	5.0.6	5.0.8	diff
sebastian/lines-of-code	upgrade	1.0.3	1.0.4	diff
sebastian/recursion-context	upgrade	4.0.5	4.0.6	diff
sebastian/resource-operations	upgrade	3.0.3	3.0.4	diff
symfony/config	upgrade	v6.0.19	v7.4.3	diff
symfony/console	upgrade	v6.0.19	v7.4.3	diff
symfony/polyfill-intl-grapheme	upgrade	v1.28.0	v1.33.0	diff
symfony/polyfill-intl-normalizer	upgrade	v1.28.0	v1.33.0	diff
symfony/service-contracts	upgrade	v3.0.2	v3.6.1	diff
symfony/stopwatch	upgrade	v6.0.19	v7.4.0	diff
symfony/string	upgrade	v6.0.19	v7.4.0	diff
theseer/tokenizer	upgrade	1.2.1	1.3.1	diff
symfony/deprecation-contracts	remove	v3.0.2	-	-
symfony/polyfill-php81	remove	v1.28.0	-	-

Important Metadata Changes

Package	Version	Metadata	From	To
phpstan/phpstan	1.12.32	source url	https://github.com/phpstan/phpstan.git

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[private-packagist]

The composer.lock diff comment has been updated to reflect new changes in this PR.