Remove lodash dependency from frontend scripts

[Aljullu]

As Gutenberg is moving away from lodash (WordPress/gutenberg#17025), we should do the same with WC Blocks scripts. At least, with scripts loaded in the frontend, so we avoid loading lodash, which is a heavy dependency, when our blocks are rendered in the frontend.

In addition to that, we should add an ESLint rule to make sure we don't introduce new usages of lodash. Gutenberg has one that we can use as a reference:

https://github.com/WordPress/gutenberg/blob/e72bc18ce7d62bed1d9514e73f5c17631bf7ed07/.eslintrc.js#L45