7.0.0: Extended match statement, cleanup & performance

• Fixed multiple semicolons yielding syntax errors, skip them instead
  (@thekid)
• Removed support for using curly braces as offset (e.g. $value{0})
  (@thekid)
• Merged PR #22: Stream tokens directly instead of using if/else cascade
  (@thekid)
• Merged PR #18: Allow match without expression: match { ... }. See
  https://wiki.php.net/rfc/match_expression_v2#allow_dropping_true
  (@thekid)
• Merged PR #17: Refactor parsing to allow blocks anywhere an expression
  is allowed. This not only allows fn() => { ... } but also using blocks
  in match expressions.
  (@thekid)
• Merged PR #21: Remove legacy XP annotations (#[@annotation]) - @thekid
• Merged PR #19: Remove support for Hack language annotations - @thekid
• Merged PR #20: Remove transformations API - @thekid

6.1.0: Non-capturing catches

• Added support for non-capturing catches, see this PHP 8 RFC:
  https://wiki.php.net/rfc/non-capturing_catches
  (@thekid)

6.0.0: Omit start tag

• Merged PR #16: Omit start token from stream - @thekid

5.4.0: Deprecate hacklang style annotations

• Merged PR #9: Deprecate hacklang-style annotations in favor PHP 8
  attributes. This is step 2 of xp-framework/compiler#86
  (@thekid)

5.3.0: Yield all tokens as written

• Fixed named arguments using keywords - @thekid
• Changed tokens to yield variables including the leading $ sign
  (@thekid)
• Fixed visitor API for unary prefix (e.g. ++$i) and unary suffix
  (e.g. $i++) operators
  (@thekid)

5.2.0: Named arguments

• Merged PR #13: Add syntactic support for named arguments (PHP 8), see
  https://wiki.php.net/rfc/named_params
  (@thekid)

5.1.0: Comments

• Merged PR #12: Improve tokenizer performance - @thekid
• Merged PR #11: Yield comments from tokenizer - @thekid
• Merged PR #10: Fix PHP 8 native syntax - @thekid

5.0.0: Integrate parser

• Merged PR #8: Add support for match expression - @thekid
• Added builtin support for null-safe instance operator ?->, see
  https://wiki.php.net/rfc/nullsafe_operator & xp-framework/compiler#9
  (@thekid)
• Merged PR #7: PHP8 attributes support - @thekid
• Integrated throw expressions, see xp-framework/compiler#85 - @thekid
• Fixed missing support for insteadof trait keyword - @thekid
• Merged PR #1: Integrate parser
  • Migrate tokenizer, parser and language from xp-framework/compiler
  • Added enclosing type to constants, properties and methods
  • Added lang.ast.Node::is() method to check for node kind
  • Added lang.ast.nodes.TypeDeclaration::declare() in favor of inject.
  • Added new parse tree API
  • Added new visitor API
  • Refactored types API to dedicated package lang.ast.types
  • Added dedicated classes for nullable, literal and value types
    (@thekid)

4.0.0: Drop PHP5

• Dropped support for PHP 5.6, see xp-framework/rfc#334 - @thekid

3.0.3: XP10 compatibility

• Added compatibility with XP 10, see xp-framework/rfc#333 - @thekid