Update symplify/easy-coding-standard requirement from ^11.0 to ^12.0

[dependabot[bot]]

Updates the requirements on symplify/easy-coding-standard to permit the latest version.

Commits

• 7372622 release PHP 7.2 downgraded
• 499907c make use of when()->needs()->giveTagged()
• b350c93 make metadata collector default singleton to keep data between rules
• a88d52a drop string dependency from console
• 497b1d6 remove symfony/strings and use directly strlen
• 368172a remove more polyfills
• a25f83d return resolver
• b75cde9 add few replaces symfony packages, as only needed by php-cs-fixer runner, not...
• b53696c add reflection accessible for PHP 7.2
• feab66f remove deprecated FunctionTypehintSpaceFixer
• Additional commits viewable in compare view

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