Add unstoppable domain resolution support

[wizlee]

Summary

• update dev dependencies due to incompatibility with Create React App
• Add Unstoppable Domain resolution API

Screenshots for success scenarios

• Successfully receive

• successfully send confirmation dialog

• successfully sent

Screenshots for error scenarios

• Valid domain but no associated dash address

• Valid domain with dash address, insufficient balance

[wizlee]

Related to #8 . Find out that able to create a PR from fork.

[JohnnyJumper]

It should be possible to get the needed information from the domain by using resolution#addr only. In case if the domain is not registered, a record is not found, or this domain is not supported (not a domain) the library will throw a corresponding error. You can catch that one and proceed with the rest of the logic. This change can speed up the process as it requires only 1 network call instead of 2.

Also, it is a great UX when the resolved address is shown under the domain once it is resolved.

Other than those 2 points above the PR looks good.