- apache#6701
- https://wiki.php.net/rfc#php_83
- https://wiki.php.net/todo/php83

- apache#6701
- https://wiki.php.net/rfc/dynamic_class_constant_fetch
- Fix the grammar file (parser)
- Add the `PHP83UnhandledError`
- Add/Fix unit tests for the parser

Example:
```php
class Example {
    const CONSTANT = 'constant';
}
$constant = 'CONSTANT';
echo Example::{$constant};
```

- apache#6701
- https://wiki.php.net/rfc/dynamic_class_constant_fetch
- Fix the `SemanticAnalysis`
- Fix the mark occurrences and the go to declaration features
- Add unit tests

- apache#6701
- https://wiki.php.net/rfc/dynamic_class_constant_fetch
- Fix the formatter
  - Add the option of the around spaces for the scope resolution operator (`::`)
  - Don't add spaces within braces (`{}`) e.g. {$example}
- Add unit tests

- apache#6701
- https://wiki.php.net/rfc/dynamic_class_constant_fetch
- Fix the code completion feature
- Add unit tests for the code completion and brace matching features

- apache#6701
- https://wiki.php.net/rfc/dynamic_class_constant_fetch
- Fix the `IntroduceSuggestion` and `PHP55UnhandledError`
- Add unit tests