Build error: "TypeError: Cannot promisify an API that has normal methods with 'Async'-suffix"

[corylulu]

I was getting build errors when I initially pulled the project that read:

> gulp postinstall
[20:35:58] Requiring external module babel-core/register
C:\projects\championify\node_modules\bluebird\js\release\promisify.js:54
                    throw new TypeError("Cannot promisify an API that has normal methods with '%s'-suffix\u000a\u000a    See http://goo.gl/MqrFmX\u000a"
                    ^
TypeError: Cannot promisify an API that has normal methods with 'Async'-suffix
    See http://goo.gl/MqrFmX
    at checkValid (C:\projects\championify\node_modules\bluebird\js\release\promisify.js:54:27)
    at promisifiableMethods (C:\projects\championify\node_modules\bluebird\js\release\promisify.js:77:5)
    at promisifyAll (C:\projects\championify\node_modules\bluebird\js\release\promisify.js:241:9)
    at Function.Promise.promisifyAll (C:\projects\championify\node_modules\bluebird\js\release\promisify.js:311:12)
    at Object.<anonymous> (C:/projects/championify/tasks/coverage.js:22:20)
    at Module._compile (module.js:570:32)
    at loader (C:\projects\championify\node_modules\babel-register\lib\node.js:144:5)
    at Object.require.extensions.(anonymous function) [as .js] (C:\projects\championify\node_modules\babel-register\lib\node.js:154:7)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at requireDir (C:\projects\championify\node_modules\require-dir\index.js:116:33)
    at Object.<anonymous> (C:/projects/championify/gulpfile.babel.js:6:1)
    at Module._compile (module.js:570:32)
    at loader (C:\projects\championify\node_modules\babel-register\lib\node.js:144:5)
    at Object.require.extensions.(anonymous function) [as .js] (C:\projects\championify\node_modules\babel-register\lib\node.js:154:7)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)

I could not figure out how to resolve it, so I had literally just commented out the error check in the bluebird repository to make it build. Lol.

The AppVeyor build does the same thing, so it's not just my environment. Not sure what the issue is with that.

[corylulu]

Fixed in #428