* 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:
  [Serializer] Fix CsvEncoder decode on empty data
  [Tests] Migrate data providers to static ones
  stop using assertObjectHasAttribute()/assertObjectHasNotAttribute()
  [Dotenv] Fix phpdoc Dotenv
  [Config] Fix phpdoc nullable
  Fix some typos

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

* 5.4:
  CS fix
  Fix test provider

…pace

* 5.4:
  trim(): Argument #1 () must be of type string, bool given
  [Dumper] Trim leading newlines when checking if value begins with a space
  Fix the list of supported shells for completions in a phar