Using PHP_CodeSniffer 4.0 error codes

• Replace PSR12.Files.FileHeader.SpacingAfterBlock with all the new modular rules, previously, just some were excluded (#31)

PHP_CodeSniffer 4.0

Support and requires PHP_CodeSniffer 4.0 (#29, #30)

• Require slevomat/coding-standard that uses PHPCS 4.0
• Replace PSR12.Files.FileHeader.SpacingAfterBlock with the new modular rules
  • See PHPCSStandards/PHP_CodeSniffer@c9c4d05 and the upgrade guide.
• Require PHP 7.4, the same as PHPCS now requires

Better support for bitwise not operator

• Require recent-ish slevomat/coding-standard (#27)

Checks for missing constant typehints

Checks for missing constant typehints (#26) docs

Allow tabs in nowdoc and heredoc

• Allow tabs in nowdoc and heredoc (#25)

Don't set `installed_paths` config

• Bump actions/checkout from 3 to 4 (#23)
• Don't set installed_paths config in ruleset file (#24)

Report more useless things

Report useless:

• parentheses (but not when in a complex ternary conditions)
• semicolons
• constant type hints

New comment sniffs

New rules:

• Checks incorrect annotation names
• Report @deprecated annotations without description
• Reports empty comments
• Reports documentation comments containing only @inheritDoc annotation

No duplicate spaces

• Disallow duplicate whitespaces (#18)

Internal changes:

• Check rules are sorted (#19)
• Export-ignore files that are not needed (#20)

New rules

• Requires slevomat/coding-standard 8.9+
• Added new rules:
  • Disallow variable variables (#14)
  • Disallow trailing multiline ternary operator (#15)
  • Yoda comparison disallow you must (#16)
• XML-lint the rules file (#17)