[eslint config] [minor] Fix typo in no-multiple-empty-lines rule

## Why is the change being made?

This change is made because the Airbnb documentation states to "avoid a
newline at the beginning of files", yet the code does not follow this.

 ## What has changed to address the problem?

This change fixes the `no-multiple-empty-lines` rule by setting max
beginning of file (`maxBOF`) to from 1 to 0.

 ## How was this change tested?

This change was tested with `npm test`.

 ## Related docs

https://github.com/airbnb/javascript#whitespace--no-multiple-empty-lines