Features

• drop unused default parameter (362abe0)
• enhance elision of await operator (ab42a90, d320a6c, 55a230d)
• extend inlining of async function (8cd95dd, d40631f)
• improve compress efficiency on block scope (260431f, 23b9f36, 06e3dbc)

Bug Fixes

• arguments object (e3798d9)
• class literal (8d23496, b9d5bba)
• destructuring syntax (749a828)
• get syntax (7fa1dea)
• lexical declaration (7e88d52)
• static class field (83f7887)