Fix bug recently introduced

[maxwellmckinnon]

Not sure if this is helpful or the right way to solve for all, but this is what I did to get things working again for me.

Otherwise the project errors on this out of the box.

Issue #23

app.js:76
    store: MongoStore.create({ mongoUrl: process.env.mongoURI }),
                      ^

TypeError: MongoStore.create is not a function

Steps to reproduce

git clone git@github.com:bradtraversy/storybooks.git .
fill in config.env details
npm install
npm run dev # or `npm start` hits the same issue

[maxwellmckinnon]

Ah although this solves the issue, the better solution is probably @adilshaik updating the package lock. I see the big V4 changes in connect-mongo now.