9.0.0: XP 12 compatibility

• Merged PR #179: XP 12 compatibility, dropping PHP 7.0 - 7.3 support!
  (@thekid)
• Removed deprecated lookup() from lang.ast.emit.GeneratedCode
  (@thekid)

8.17.2: Implicitely nullable type fix

• Fixed implicitely nullable type warnings for parameters with non-
  constant expressions (e.g. $param= new Handle(0)) in PHP 8.4, see
  https://wiki.php.net/rfc/deprecate-implicitly-nullable-types
  (@thekid)

8.17.1: Closure emitting fix

• Fixed emitting captures and return types for closures - @thekid

8.17.0: Locals fix & performance

• Merged PR #177: Remove Result::$stack. Use local variables for backing
  up and restoring locals instead. Slight performance improvement.
  (@thekid)
• Fixed issue #176: Lambda parameters bleeding into locals - @thekid

8.16.0: Transform without statements

• Merged PR #175: Transform multiple nodes without creating statements
  (@thekid)
• Refactored code base to use the new reflection library instead of
  the Package class from lang.reflect. See xp-framework/rfc#338
  (@thekid)

8.15.1: Constructor invocation fix

• Fixed parent constructors not being invoked when using non-constant
  property initialization.
  (@thekid)

8.15.0: Override annotation

• Merged PR #173: Check for #[Override] annotation, implementing this
  PHP 8.3 RFC: https://wiki.php.net/rfc/marking_overriden_methods
  (@thekid)
• Merged PR #171: Refactor scope lookup from Result to CodeGen - @thekid

8.14.0: Arbitrary static variable initializers

• Fixed error Cannot access offset of type array on array when using
  reflection for non-constant parameter defaults
  (@thekid)
• Implemented feature #162: Arbitrary static variable initializers, see
  https://wiki.php.net/rfc/arbitrary_static_variable_initializers
  (@thekid)

8.13.0: Annotation emit refactoring

• Merged PR #169: Refactor how annotations with non-constant arguments
  are emitted. This enables a transition to xp-framework/reflection
  as proposed in xp-framework/rfc#338
  (@thekid)

8.12.0: Return by reference

• Merged PR #168: Return by reference from methods and functions, see
  https://www.php.net/manual/en/language.references.return.php
  (@thekid)
• Make it possible to refer to constructor parameters inside property
  initialization expressions.
  (@thekid)