Update symfony/console requirement from ^3.3 to ^4.3

[dependabot-preview]

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

Changelog

Sourced from symfony/console's changelog.

4.3.0

• added support for hyperlinks
• added ProgressBar::iterate() method that simplify updating the progress bar when iterating
• added Question::setAutocompleterCallback() to provide a callback function
  that dynamically generates suggestions as the user types

4.2.0

• allowed passing commands as [$process, 'ENV_VAR' => 'value'] to
  ProcessHelper::run() to pass environment variables
• deprecated passing a command as a string to ProcessHelper::run(),
  pass it the command as an array of its arguments instead
• made the ProcessHelper class final
• added WrappableOutputFormatterInterface::formatAndWrap() (implemented in OutputFormatter)
• added capture_stderr_separately option to CommandTester::execute()

4.1.0

• added option to run suggested command if command is not found and only 1 alternative is available
• added option to modify console output and print multiple modifiable sections
• added support for iterable messages in output write and writeln methods

4.0.0

• OutputFormatter throws an exception when unknown options are used
• removed QuestionHelper::setInputStream()/getInputStream()
• removed Application::getTerminalWidth()/getTerminalHeight() and
  Application::setTerminalDimensions()/getTerminalDimensions()
• removed ConsoleExceptionEvent
• removed ConsoleEvents::EXCEPTION

3.4.0

• added SHELL_VERBOSITY env var to control verbosity
• added CommandLoaderInterface, FactoryCommandLoader and PSR-11
  ContainerCommandLoader for commands lazy-loading
• added a case-insensitive command name matching fallback
• added static Command::$defaultName/getDefaultName(), allowing for
  commands to be registered at compile time in the application command loader.
  Setting the $defaultName property avoids the need for filling the command
  attribute on the console.command tag when using AddConsoleCommandPass.

3.3.0

... (truncated)

Commits

• 707b619 Reference individual contracts packages
• 260d24e Merge branch '4.2' into 4.3
• 7a293c9 Merge branch '3.4' into 4.2
• 8e1d1e4 bug #31261 [Console] Commands with an alias should not be recognized as ambig...
• 5c693cb fixed tests
• ca4d3f9 fixed a test
• 64df53f Merge branch '4.2'
• 28e7360 Merge branch '3.4' into 4.2
• ad26ac2 refactored code
• d9e4b71 [Console] Commands with an alias should not be recognized as ambiguous
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #21.