$ jspm install
err C:\Users\19680\AppData\Roaming\npm\node_modules\jspm\node_modules_@jspm_npm@1.0.0@@jspm\npm\npm.js:303
for await (const chunk of createPublishStream.call(this, pjson, tarStream, { readme, description: pjson.description, tag, access, registryUrlObj })) {
^^^^^

SyntaxError: Unexpected reserved word
at createScript (vm.js:80:10)
at Object.runInThisContext (vm.js:139:10)
at Module._compile (module.js:617:28)
at Object.Module._extensions…js (module.js:664:10)
at Module.load (module.js:566:32)
at tryModuleLoad (module.js:506:12)
at Function.Module._load (module.js:498:3)
at Module.require (module.js:597:17)
at require (internal/module.js:11:18)
at RegistryManager.getEndpoint (C:\Users\19680\AppData\Roaming\npm\node_modules\jspm\lib\install\registry-manager.js?39)

是因为nodejs版本原因吗？我nodejs是v8.12.0，npm是6.4.1