Developer script "generate wallets" not working

[tuliomir]

The generate_wallets.js script is no longer working because a helper it depends on requires jest to run since #340.

hathor-wallet-headless/__tests__/integration/configuration/settings-fixture.js

Lines 42 to 43 in fb0ce45

	setupConfig: jest.fn().mockImplementation(() => Promise.resolve()),
	reloadConfig: jest.fn().mockImplementation(() => Promise.resolve()),

There should be some way to run this script on a development environment.