v5.0.2

• Fixed handling of arrow-function destructuring parameters
• Added parser support and regression coverage for:
  • ?? as LogicalExpression, including invalid unparenthesized mixes with &&/||
  • optional chaining as ChainExpression
  • numeric separators in numeric and BigInt literals
  • computed and literal class fields
• Fixed class element validation:
  • require separators after computed/literal class fields
  • reject invalid async modifiers before class fields
  • reject non-computed class fields named constructor, including static and string-literal forms
• Updated async computed class method fixture output.
• Modernized packaging/test setup