Merge branch 'feature/3668-psr12-classinstantiation-fix-regression' of https://github.com/jrfnl/PHP_CodeSniffer

Merge branch 'feature/squiz-operatorbracket-fix-regression-parent' of https://github.com/jrfnl/PHP_CodeSniffer

Related to 3546 which fixed an inconsistency after 3484.

The change of the tokenization from `T_STRING` to `T_PARENT` for the `parent` keyword caused a regression in the `Squiz.Formatting.OperatorBracket` sniff.

Fixed now.

Includes unit tests.

Related to 3546 which fixed an inconsistency after 3484.

The change of the tokenization from `T_STRING` to `T_PARENT` for the `parent` keyword in `new parent` caused a regression in the `Generic.Functions.FunctionCallArgumentSpacing` sniff.

Fixed now.

Includes unit tests.

Related to 3546 which fixed an inconsistency after 3484.

The change of the tokenization from `T_STRING` to `T_PARENT` for the `parent` keyword in `new parent` caused a regression in the `PSR12.Classes.ClassInstantiation` sniff.

Fixed now.

Includes unit tests.

Fixed bug #3666 : PEAR.Functions.FunctionCallSignature incorrect indent fix when checking mixed HTML/PHP files

Merge branch 'feature/tokenizer-php-bug-fix-short-list-in-non-braced-control-structure' of https://github.com/jrfnl/PHP_CodeSniffer

As per https://getcomposer.org/doc/04-schema.md#keywords by including "static analysis" as a keyword in the `composer.json` file, Composer 2.4.0-RC1 and later will prompt users if the package is installed with `composer require` instead of `composer require --dev`. See https://github.com/composer/composer/pull/10960 for more info.

PHP 7.4 arrow functions were not yet being taken into account for this sniff.

Fixed now.
Includes unit tests.

When a child process fails, e.g. with a FatalError, it might still return empty list of errors. Although, child process failure is definitely not a thing we want to ignore.

Therefore, we check exit status of each child process and make sure parent process fails (and returns non-zero status code) as well.

Originally reported in sirbrillig/phpcs-variable-analysis 263.

When the short list syntax would be used as the first contents within a control structure without braces, the square brackets would be tokenized as plain square brackets, not as short array brackets.

```php
if ( true )
    [ $a ] = [ 'hi' ]; // The first `[` in this line was tokenized incorrectly.

return $a ?? '';
```

Fixed now by checking whether the preceding parenthesis closer has an owner and if that owner could be a scope owner.

Includes unit tests.
Includes updating the data providers to use named data sets to allow for easier debugging.

As discussed in 3621, this PR adds a new function to show a "friendly" error message if/when PHPCS runs out of memory.

This functionality can't be tested via the unit/integration test suite as the PHP shutdown can't be mocked.

To test the functionality, I used a test run of PHPCS over its own code base with the following command:
```bash
phpcs -d memory_limit 32M
```

Fixes 3621

Co-authored-by: Alain Schlesser <alain.schlesser@gmail.com>

Merge branch 'feature/3618-generic-arbitrary-parentheses-bugfix' of https://github.com/jrfnl/PHP_CodeSniffer

Fixes 3616

Note: I've changed the `findNext()` call from an exhaustive call to the end of the statement to a faster check for the first non-empty token, which I believe was the actual _intention_ of the function call.

As no tests are failing, I'm fairly certain my suspicion is correct ;-)

Follow up to PR 3546, which changed how the `parent` keyword in a `new parent` snippet was tokenized from `T_STRING` to `T_PARENT`.

The `T_PARENT` keyword token, however, was not included in the `Tokens::$functionNameTokens` array, which was the underlying cause for the bug reported in 3618.

Fixed now.

Tested by adding additional tests to the `Generic.WhiteSpace.ArbitraryParenthesesSpacing` sniff. These tests passed in PHPCS 3.6.2 and started failing in PHPCS 3.7.0. Once this fix has been merged, the tests will pass again.

Merge branch 'feature/3609-bugfix-context-sensitive-keyword-empty' of https://github.com/jrfnl/PHP_CodeSniffer

As reported in 3609, the `empty` keyword, as well as the `isset` and `unset` keywords, was not included in the list of context sensitive keyword. This is a regression compared to PHPCS 3.6.2.

Fixed now, including unit tests.

Note: I've now done a full comparison with the [reserved keyword list as per the PHP manual](https://www.php.net/manual/en/reserved.keywords.php). This should hopefully fix the remaining stranglers.

Fixes 3609

Merge branch 'feature/tokenizer-php-bugfix-double-quoted-strings' of https://github.com/jrfnl/PHP_CodeSniffer