yarn versions
Yarn版本
显示当前安装的Yarn，Node.js及其依赖项的版本信息。
yarn versions
yarn versions
yarn versions v0.24.5
{ http_parser: '2.7.0',
node: '7.10.0',
v8: '5.5.372.43',
uv: '1.11.0',
zlib: '1.2.11',
ares: '1.10.1-DEV',
modules: '51',
openssl: '1.0.2k',
icu: '58.2',
unicode: '9.0',
cldr: '30.0.3',
tz: '2016j' }
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