V8.8.0: Bug fixes and deprecations

Added

• OutputFormat properties for space around specific list separators (#880)

Changed

• Mark the OutputFormat constructor as @internal (#1131)
• Mark OutputFormatter as @internal (#896)
• Mark Selector::isValid() as @internal (#1037)
• Mark parsing-related methods of most CSS elements as @internal (#908)
• Mark OutputFormat::nextLevel() as @internal (#901)
• Make all non-private properties @internal (#886)

Deprecated

• Deprecate extending OutputFormat (#1131)
• Deprecate OutputFormat::get() and ::set() (#1107)
• Deprecate support for -webkit-calc and -moz-calc (#1086)
• Deprecate magic method forwarding from OutputFormat to OutputFormatter
  (#894)
• Deprecate __toString() (#1006)
• Deprecate greedy calculation of selector specificity (#1018)
• Deprecate the IE hack in Rule (#993, #1003)
• OutputFormat properties for space around list separators as an array (#880)
• Deprecate OutputFormat::level() (#870)

Fixed

• Include comments for all rules in declaration block (#1169)
• Render rules in line and column number order (#1059)
• Create Size with correct types in expandBackgroundShorthand (#814)
• Parse @font-face src property as comma-delimited list (#794)