Replace lodash with lodash-es

[dutchmartin]

Summary

This PR can be summarized in the following changelog entry:

• Replaced lodash with lodash-es

Relevant technical choices:

• Replace all lodash imports with a named one like import { isEqual } from "lodash-es" for better treeshaking support.

Test instructions

This PR can be tested by following these steps:

• Test if the standalone still works by running yarn start

[bintzandt]

PR transferred to https://github.com/Yoast/javascript/pull/24