Features improve compression on tagged template literal (e0695ef) support source mapping of class property (5d4e6e3) Bug Fixes arguments object (de376c3, df47632) function scope (eb08fed) lexical declaration (8b0c836, 1e787c5, 7caab39) optional chaining operator (4a19575) private class property (d2a45ba) static class field (eff45ea) throw statement (d6152e6)