Fix typo

[alexanderGugel]

No description provided.

[nylen]

👍 thanks!

[rlidwka]

I don't understand how is this a typo considering that almost every single node.js library shortens error to err.

[rlidwka]

And we have another two err's in this very README.

[mikeal]

For documentation it's best to be as explicit as possible, +1 for changing to error everywhere.

[nylen]

I personally prefer err in my own code too, but the issue here was that the callback function parameters said one thing (error) and the callback code said another (err). I would have accepted the fix either way, and we say error more often than err in the documentation.

[rlidwka]

but the issue here was that the callback function parameters said one thing (error) and the callback code said another (err).

Oh, sorry... you're right, it's a typo