Support new PHP 8.2 syntaxes

[jrfnl]

PHP 8.2 includes the following new syntaxes for which it should be verified if the Tokenizer needs updates and/or whether any sniffs need updates:

To do

All done

Done

• Readonly classes
  • Tokenizer changes needed - PR Fix mis-identification of 'readonly' keyword squizlabs/PHP_CodeSniffer#3773 / Tokenizer/PHP: fix mis-identification of 'readonly' keyword icw PHP 8.2 DNF types #34
  • Updates needed to utility functions - getClassProperties() - PR PHP 8.2 | File::getClassProperties(): add support for readonly classes squizlabs/PHP_CodeSniffer#3686
  • Sniff updates needed - PRs PHP 8.2 | PSR1/SideEffects: allow for readonly classes squizlabs/PHP_CodeSniffer#3728, PSR12/FileHeader: bug fix - false positives on PHP 8.2+ readonly classes squizlabs/PHP_CodeSniffer#3816, PHP 8.2 | Support readonly classes in 11 sniffs squizlabs/PHP_CodeSniffer#3826
• Allow null, false, true as stand-alone types
  • Tokenizer changes needed - PR PHP 8.2 | Tokenizer, File, sniffs: account for new true type squizlabs/PHP_CodeSniffer#3662 / PHP 8.2 | Tokenizer, File, sniffs: account for new true type #49
  • Updates needed to utility functions - getMethodProperties(), getMethodParameters(), getMemberProperties() - PR PHP 8.2 | Tokenizer, File, sniffs: account for new true type squizlabs/PHP_CodeSniffer#3662 / PHP 8.2 | Tokenizer, File, sniffs: account for new true type #49
  • Sniff updates needed - PR PHP 8.2 | Tokenizer, File, sniffs: account for new true type squizlabs/PHP_CodeSniffer#3662 / PHP 8.2 | Tokenizer, File, sniffs: account for new true type #49
• Constants in traits
  • Tokenizer changes needed
  • Sniff updates needed
• Disjunctive Normal Form Types
  • Tokenizer changes needed - see Proposal for supporting PHP 8.2+ Disjunctive Normal Form Types in the Tokenizer #387, PR PHP 8.2 | Tokenizer/PHP: add support for DNF types #461
  • Sniff updates needed - also see PHP 8.2 - DNF Support squizlabs/PHP_CodeSniffer#3731, PRs PHP 8.2 | File::getMethodParameters(): add support for DNF types #471, PHP 8.2 | File::getMethodProperties(): add support for DNF types #472, PHP 8.2 | File::getMemberProperties(): add support for DNF types #473, Generic/LowerCaseType: add support for examining DNF types #478