更新sign.js, 无需jsdom

[lc-official]

近两天貌似抖音更新了signature生成方法，所以把最新的webessdk.es5.js打包，并发现可通过Object.defineProperty方法将envcode强制锁定为1，成功剔除了jsdom

[keykey17]

您好，我用了最新了sign.js，在运行时报错了，麻烦帮忙看下是什么原因
File "/Users/zuo/Library/Python/3.9/lib/python/site-packages/execjs/_external_runtime.py", line 134, in _fail_on_non_zero_status
raise ProcessExitedWithNonZeroStatus(status=status, stdout=stdoutdata, stderr=stderrdata)
execjs._exceptions.ProcessExitedWithNonZeroStatus: (101, '', '/var/folders/w0/0xywkqvj7bjf5p0y97y6rs2c0000gn/T/execjss3z8zool.js:3821:15 Expected ident but found (\n get() {\n ^\n/var/folders/w0/0xywkqvj7bjf5p0y97y6rs2c0000gn/T/execjss3z8zool.js:3824:19 Expected , but found {\n set(e) {}\n ^\n/var/folders/w0/0xywkqvj7bjf5p0y97y6rs2c0000gn/T/execjss3z8zool.js:6513:4 Expected eof but found }\n });\n ^\n')