Upgrade dependencies

[dasanra]

Upgrade dependencies:

• Upgrade to react-scripts: 4
• Migrate from node-sass to sass
• Remove react-app-rewired because it's deprecated and not needed anymore
• Upgrade Ledger transport for desktop app

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	7	0
Ignored	2	N/A

• Result: ✅ success

• Annotations: 7 total

  ---

[warning] @typescript-eslint/explicit-module-boundary-types

Require explicit return and argument types on exported functions' and classes' public class methods

• src/routes/opening/index.tsx Line 107 - Object pattern argument should be typed.
• src/routes/welcome/components/Layout.tsx Line 28 - Missing return type on function.
• src/routes/welcome/components/Layout.tsx Line 28 - Object pattern argument should be typed with a non-any type.
• src/routes/welcome/components/Layout.tsx Line 45 - Missing return type on function.
• src/routes/welcome/components/Layout.tsx Line 45 - Object pattern argument should be typed.
• src/routes/welcome/components/Layout.tsx Line 61 - Missing return type on function.
• src/routes/welcome/components/Layout.tsx Line 61 - Object pattern argument should be typed with a non-any type.

---

^{Report generated by eslint-plus-action}

[ghost]

Travis automatic deployment:
https://pr1691--safereact.review.gnosisdev.com/rinkeby/app

[ghost]

Travis automatic deployment:
https://pr1691--safereact.review.gnosisdev.com/rinkeby/app

[ghost]

Travis automatic deployment:
https://pr1691--safereact.review.gnosisdev.com/volta/app