Fix for crash when using Node.js v9

[pincheira]

The app is crashing when calling the login action on UsersAuthController, due to an undocumented change in Node.js v9 that breaks rand-token, but it was fixed on version 0.4.0. I am using Node.js 9.5.0 and I can confirm crash is now gone after this update.

Error output was:

internal/crypto/random.js:44
    throw new errors.TypeError('ERR_INVALID_CALLBACK');
    ^

TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
    at Object.randomBytes (internal/crypto/random.js:44:11)
    at Object.options.source (/Users/jp/spare/react-native-authentication/server/node_modules/rand-token/index.js:60:25)
    at Object.generate (/Users/jp/spare/react-native-authentication/server/node_modules/rand-token/index.js:95:29)
    at child.findOrAdd (/Users/jp/spare/react-native-authentication/server/api/models/Tokens.js:31:21)
    at child.wrapper [as findOrAdd] (/Users/jp/spare/react-native-authentication/server/node_modules/lodash/index.js:3095:19)
    at passport.authenticate (/Users/jp/spare/react-native-authentication/server/api/controllers/UsersAuthController.js:36:18)
    at BasicStrategy.strategy.success (/Users/jp/spare/react-native-authentication/server/node_modules/passport/lib/middleware/authenticate.js:201:18)
    at verified (/Users/jp/spare/react-native-authentication/server/node_modules/passport-http/lib/passport-http/strategies/basic.js:91:10)
    at bcrypt.compare (/Users/jp/spare/react-native-authentication/server/config/passport.js:48:13)

More info: sehrope/node-rand-token#9

Cheers and thank you for your post! https://medium.com/@alexmngn/the-essential-boilerplate-to-authenticate-users-on-your-react-native-app-f7a8e0e04a42 👍🏻 🍻