Failed to `npm install` on Windows

[janjaali]

First of all, thanks for your great library!

I have lately encountered a problem while installing this library via npm install on Windows. The error message is as follows:

npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c . ./bin/main.sh
npm ERR! '.' is not recognized as an internal or external command,
npm ERR! operable program or batch file.

Do you mind if we switch the executed ./bin/main.sh to a ./bin/main.js file so that the installment becomes platform independent? I would create a PR for that.

Cheers ;)