[BUG] Entire lodash is imported, bloating dependencies

[depo34]

Specific functions from lodash are being used, but because the entire library is being import-ed, bundlers like webpack are including all of lodash.

To Reproduce

1. Pull fast-csv into a project that's built with webpack
2. Look at webpack dependencies

Expected behavior
Only portions of lodash should be imported

E.g., import isString from 'lodash/isString';

Screenshots
E.g., import { isString } from 'lodash'; // Bundlers will bring all of lodash here

Desktop (please complete the following information):
n/a

Additional context
lodash/lodash#3192

[doug-martin]

Fixed in v3.5.0