* 4.4:
  Bump license year
  [Form] fix passing null $pattern to IntlDateFormatter
  Update README.md

* 5.1:
  Bump license year
  Bump license year
  [Form] fix passing null $pattern to IntlDateFormatter
  Add reference link
  Update README.md

* 4.4:
  Use ::class keyword when possible

* 5.1:
  Use ::class keyword when possible

* 5.1:
  Use ::class keyword when possible

…otFoundException

* 4.4:
  [HttpFoundation] Drop int return type from parseFilesize()
  Added $translator->addLoader()
  bug symfony/symfony#39878 [doctrine-bridge] Add username to UserNameNotFoundException
  fix spelling
  Add check for constant in Curl client
  Revert #38614, add assert to avoid regression
  Fix problem when SYMFONY_PHPUNIT_VERSION is empty string value
  Update PHP CS Fixer config to v2.18

* 5.1:
  [HttpFoundation] Drop int return type from parseFilesize()
  Added $translator->addLoader()
  bug symfony/symfony#39878 [doctrine-bridge] Add username to UserNameNotFoundException
  [Uid] Clarify the format returned by getTime()
  fix spelling
  Add check for constant in Curl client
  Revert #38614, add assert to avoid regression
  Fix container injection with TypedReference
  Fix problem when SYMFONY_PHPUNIT_VERSION is empty string value
  Update PHP CS Fixer config to v2.18

* 4.4:
  Use createMock() and use import instead of FQCN

* 5.1:
  Use createMock() and use import instead of FQCN