Error for YeezySneak

gistfile1.txt

ERROR: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
chrome
Syntax    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:413:25)
    at Object.Module._extensions..js (module.js:452:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Module.require (module.js:365:17)
    at require (module.js:384:17)
    at PATH/node_modules/wdio-jasmine-framework/node_modules/jasmine/lib/jasmine.js:86:5
    at Array.forEach (native)
    at Jasmine.loadSpecs (PATH/node_modules/wdio-jasmine-framework/node_modules/jasmine/lib/jasmine.js:84:18)

[19:00:29] 'yeezy' errored after 4.86 s
[19:00:29] Error in plugin 'gulp-webdriver'
Message:
    wdio exited with code 1