This PR was squashed before being merged into the 5.4 branch.

Discussion
----------

Update license years (last time)

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | n/a

Commits
-------

89f86de567 Fix LICENSE CI check
d2e034abf0 Update license years (last time)

* 5.4:
  Fix LICENSE CI check
  fixes retrieving multiple values for extra fields
  [String] Remove duplicates in fold maps
  fail with a meaningful error when a needed package is missing
  [DependencyInjection] Fix combinatory explosion when autowiring union and intersection types
  Update license years (last time)
  [Tests] New iteration of removing `$this` occurrences in future static data providers

* 5.4:
  Migrate to `static` data providers using `rector/rector`

* 5.4:
  CS fix
  Fix test provider

* 5.4:
  fix style of label containing new lines in PUML dump
  [TwigBridge] Allow floats in html5 input type number field
  [Translation] Handle the translation of empty strings
  [VarDumper] Fix error when reflected class has default Enum parameter in constructor
  [FrameworkBundle] Fix denyAccessUnlessGranted for mixed attributes
  [Validator] Fix translation of AtLeastOneOf constraint message
  [Validator] Sync IBAN formats with Swift IBAN registry
  [String] Use same alphabet for ByteString::fromRandom tests
  Fix phpdocs in components

* 5.4:
  re-allow phpdocumentor/type-resolver 1.7
  skip test using attributes on PHP 7
  [HttpClient] Encode and decode curly brackets {}
  fix: GetSetMethodNormalizer::supportss should not check ignored methods
  Stop stopwatch events in case of exception
  add translations for the filename max length validator option
  [Validator] Update BIC validator IBAN mappings
  [String] Correct inflection of 'codes' and 'names'