V9.2.0: New features and deprecations

Added

• Add OutputFormat::setSpaceAroundSelectorCombinator() (#1504)
• Add support for escaped quotes in the selectors (#1485, #1489)
• Provide line number in exception message for mismatched parentheses in
  selector (#1435)
• Add support for CSS container queries (#1400)

Changed

• RuleSet\RuleContainer is renamed to RuleSet\DeclarationList (#1530, #1539)
• Methods like setRule() in RuleSet and DeclarationBlock have been renamed
  to setDeclaration(), etc. (#1521)
• Rule\Rule class is renamed to Property\Declaration
  (#1508, #1512, #1513, #1522)
• Rule::setRule() and getRule() are replaced with setPropertyName() and
  getPropertyName() (#1506)
• Selector is now represented as a sequence of Selector\Component objects
  which can be accessed via getComponents(), manipulated individually, or set
  via setComponents() (#1478, #1486, #1487, #1488, #1494, #1496, #1536, #1537)
• Selector::setSelector() and Selector constructor will now throw exception
  upon provision of an invalid selectior (#1498, #1502)
• Clean up extra whitespace in CSS selector (#1398)
• The array keys passed to DeclarationBlock::setSelectors() are no longer
  preserved (#1407)

Deprecated

• RuleSet\RuleContainer is deprecated; use RuleSet\DeclarationList instead
  (#1530)
• Methods like setRule() in RuleSet and DeclarationBlock are deprecated;
  there are direct replacements such as setDeclaration() (#1521)
• Rule\Rule class is deprecated; Property\Declaration is a direct
  replacement (#1508)
• Rule::setRule() and getRule() are deprecated and replaced with
  setPropertyName() and getPropertyName() (#1506, #1519)

Fixed

• Do not escape characters that do not need escaping in CSS string (#1444)
• Reject selector comprising only whitespace (#1433)
• Improve recovery parsing when a rogue } is encountered (#1425, #1426)
• Parse comment(s) immediately preceding a selector (#1421, #1424)
• Parse consecutive comments (#1421)
• Support attribute selectors with values containing commas in
  DeclarationBlock::setSelectors() (#1419)
• Allow removeDeclarationBlockBySelector() to be order-insensitve (#1406)
• Fix parsing of calc expressions when a newline immediately precedes or
  follows a + or - operator (#1399)
• Use typesafe versions of PHP functions (#1379, #1380, #1382, #1383, #1384)

New Contributors

• @scq made their first contribution in #1399
• @8ctopus made their first contribution in #1398
• @samuil-banti-wpenigne made their first contribution in #1485

Full Changelog: v9.1.0...v9.2.0