Fix version variables in Contao recipe

[ameotoko]

• Bug fix

This PR fixes default values of config variables contao_version and symfony_version.

Context:

When installed, Contao overrides output of Symfony's console command bin/console --version, so that it returns Contao's version instead of Symfony's. The only way the get Symfony's version in this case is to run bin/console about.

In addition, bin/console contao:version command is deprecated since Contao 4.13 (current LTS), and no longer works in Contao 5.2 (current latest). Thus, in Contao 4.13 both console --version and console contao:version show Contao's version and neither of them shows Symfony's. In Contao 5.2, console --version shows Contao's version, and console contao:version fails.

This PR fixes it by parsing output of bin/console --version into contao_version variable, and bin/console about – into symfony_version. The fix works for both Contao 4.13 and Contao 5.2 versions. The parsing is done in the same way as in the bare Symfony's recipe:

deployer/recipe/symfony.php

Lines 8 to 12 in a0a21e2

	set('symfony_version', function () {
	$result = run('{{bin/console}} --version');
	preg_match_all('/(\d+\.?)+/', $result, $matches);
	return $matches[0][0] ?? 5.0;
	});