.eslintrc.json: adjust eslint rules to enforce readable chain syntax

[Swiftb0y]

previously, the eslint hook would enforce that the dot of multi-
line chaining was attached to the object instead of the property
thus formatting the first example into the second which I
find less readable.

const a = _({})
    .mapKeys(...)
    .filter(...)
    .value();

const a = _({}).
    mapKeys(...).
    filter(...).
    value();