Bump friendsofphp/php-cs-fixer to 3.x in /composer/helpers/v1

[jeffwidman]

Bumped to V3 in order to fix the following deprecation warnings:

15.95 > php-cs-fixer fix --diff --verbose '--dry-run'
16.10 You are running PHP CS Fixer v2, which is not maintained anymore. Please update to v3.
16.10 You may find an UPGRADE guide at https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/v3.3.0/UPGRADE-v3.md .
16.10 If you need help while solving warnings, ask at https://gitter.im/PHP-CS-Fixer, we will help you!
16.10
16.10 PHP CS Fixer 2.19.3 Testament by Fabien Potencier and Dariusz Ruminski
16.10 Runtime: PHP 7.4.30
16.10 Loaded config default from "/opt/composer/v1/.php_cs".
16.14 ......
16.26 Legend: ?-unknown, I-invalid file syntax (file ignored), S-skipped (cached or empty file), .-no changes, F-fixed, E-error
16.26
16.26 Checked all files in 0.134 seconds, 14.000 MB memory used
16.26
16.26 Detected deprecations in use:
16.26 - Option "ensure_fully_multiline" for rule "method_argument_space" is deprecated and will be removed in version 3.0. Use option "on_multiline" instead.
16.26 - Option "use_yoda_style" for rule "is_null" is deprecated and will be removed in version 3.0. Use "yoda_style" fixer instead.
16.26 - PhpCsFixer\Config::create is deprecated since 2.17 and will be removed in 3.0, use the constructor instead.
16.26 - Rule "no_multiline_whitespace_before_semicolons" is deprecated. Use "multiline_whitespace_before_semicolons" instead.

I also removed a couple of rules to make the config file consistent with the changes made in
https://github.com/dependabot/dependabot-core/pull/3840/files.

As best I can tell, the removed rules were removed because their defaults changed to match what we were specifying. The one curious change was method_argument_space, as the default did change, but not to what we were specifying. For now I thought simplest to match the other config and put up the PR and see if it complains at all. If so, I can dig in further.

[jeffwidman]

Oh interesting, the rebase on #5691 followed the file rename w/o creating a conflict... very impressive Mr Git!

[jeffwidman]

So after chasing this a while, this won't work:

• php-cs-fixer requires composer/semver >= 3.0: https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/abf6c314b99bd6dc156ab8e39967956141d8594c/composer.json#L20 - this bump landed as part of the 3.0 milestone for php-cs-fixer, so can't just downgrade to an earlier v3 release.
• composer v1 requires composer/semver ^1: https://github.com/composer/composer/blob/9c86ff9fff272bd0953c58ec793e62626dafaa00/composer.json#L27

Bummer, but not a huge deal given that composer v1 support is essentially EOL at this point, and this PR gave me what I wanted which was an opportunity to learn how Composer works.

[jeffwidman]

Closing in favor of #5713