Breaking changes

• drop support for old versions of PHP and Symfony
  • the minimum version of PHP is 8.1
  • the supported Symfony versions are 5.4 and 6.3
• remove Bower integration

Changed

• update official name of Turkey (#458)
• update flags for Afghanistan, France, Honduras and Mauritania (#455)
• remove empty strings (#488)
• fix polish translation of United Kingdom (#453)
• refactor build script
• add Dependabot integration