不支持ES6?

[fengerwoo]

• wept --0.9.2 140900:
• node --v8.9.4:
• 操作系统: Mac 10.13.1
• 浏览器及浏览器版本: Chrome 63.0.3239.132
• 与官方工具表现不一致？ 否

执行wept报错

错误日志

listening on port 3000
utils/context.js: Unexpected token (6:25)
SyntaxError: utils/context.js: Unexpected token (6:25)
  4 | class context{
  5 |
> 6 |   static play_audio_data = {};
    |                          ^
  7 |   static call_stop_play = false;
  8 |
  9 |   static play_audio(this_object, path){
    at Parser.pp$5.raise (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:4454:13)
    at Parser.pp.unexpected (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:1761:8)
    at Parser.pp$1.parseClassProperty (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:2571:50)
    at Parser.pp$1.parseClassBody (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:2516:34)
    at Parser.pp$1.parseClass (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:2406:8)
    at Parser.pp$1.parseStatement (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:1843:19)
    at Parser.pp$1.parseBlockBody (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:2268:21)
    at Parser.pp$1.parseTopLevel (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:1778:8)
    at Parser.parse (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:1673:17)
    at parse (/usr/local/lib/node_modules/wept/node_modules/babylon/lib/index.js:7305:37)

界面截图（可选）

[chemzqm]

你这个不是es6语法，属于 stage 阶段或者 es7