Investigate possible improvements to build time.

[faival]

Expected behaviour

We should try to decrease build time of a production, dev, and test build goals.

• Possible bottleneck scenarios:

• webpack version
• webpack config merges/handlings
• moving of assets
• babel version
• output of logs

Related:

• Mocking localstorage  jestjs/jest#2098
• JSDom 11.12 causes SecurityError: localStorage is not available for opaque origins jestjs/jest#6766
• jest : SecurityError: localStorage is not available for opaque origins jsdom/jsdom#2304
• jsdom update 5 days ago breaks back compatability jestjs/jest#6798
• SecurityError: localStorage is not available for opaque origins jestjs/jest#6769

Examples:

• https://github.com/keyanzhang/jest-css-modules-example/blob/master/package.json
• https://github.com/i18next/react-i18next/blob/23119de14e3f33c6f3c29d6657ad8a0cd7db4c6c/example/test-jest/README.md

Actual behaviour

Prod, dev, and test goals should take a reasonable time

Steps to reproduce

[faival]

Related to #526

[slaweet]

Cleaning up - Closing issues that were open for a long time without any update. We can re-open if needed.