Update symfony/form requirement from ^3.4|^4.0 to ^3.4.x-dev

[dependabot-preview]

Updates the requirements on symfony/form to permit the latest version.

Changelog

Sourced from symfony/form's changelog.

CHANGELOG

5.0.0

• Removed support for using different values for the "model_timezone" and "view_timezone" options of the TimeType
  without configuring a reference date.
• Removed the scale option of the IntegerType.
• Using the date_format, date_widget, and time_widget options of the DateTimeType when the widget option is
  set to single_text is not supported anymore.
• The format option of DateType and DateTimeType cannot be used when the html5 option is enabled.
• Using names for buttons that do not start with a letter, a digit, or an underscore throw an exception
• Using names for buttons that do not contain only letters, digits, underscores, hyphens, and colons throw an exception.
• removed the ChoiceLoaderInterface implementation in CountryType, LanguageType, LocaleType and CurrencyType
• removed getExtendedType() method of the FormTypeExtensionInterface
• added static getExtendedTypes() method to the FormTypeExtensionInterface
• calling to FormRenderer::searchAndRenderBlock() method for fields which were already rendered throw a BadMethodCallException
• removed the regions option of the TimezoneType
• removed the $scale argument of the IntegerToLocalizedStringTransformer
• removed TemplatingExtension and TemplatingRendererEngine classes, use Twig instead
• passing a null message when instantiating a Symfony\Component\Form\FormError is not allowed
• removed support for using int or float as data for the NumberType when the input option is set to string

4.4.0

• using different values for the "model_timezone" and "view_timezone" options of the TimeType without configuring a
  reference date is deprecated
• preferred choices are repeated in the list of all choices
• deprecated using int or float as data for the NumberType when the input option is set to string
• The type guesser guesses the HTML accept attribute when a mime type is configured in the File or Image constraint.
• Overriding the methods FormIntegrationTestCase::setUp(), TypeTestCase::setUp() and TypeTestCase::tearDown() without the void return-type is deprecated.
• marked all dispatched event classes as @final

4.3.0

• added a symbol option to the PercentType that allows to disable or customize the output of the percent character
• Using the format option of DateType and DateTimeType when the html5 option is enabled is deprecated.
• Using names for buttons that do not start with a letter, a digit, or an underscore is deprecated and will lead to an
  exception in 5.0.
• Using names for buttons that do not contain only letters, digits, underscores, hyphens, and colons is deprecated and
  will lead to an exception in 5.0.
• added html5 option to NumberType that allows to render type="number" input fields
• deprecated using the date_format, date_widget, and time_widget options of the DateTimeType when the widget
  option is set to single_text
• added block_prefix option to BaseType.
• added help_html option to display the help text as HTML.
• FormError doesn't implement Serializable anymore

... (truncated)

Commits

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