* Use a Swaps v2 API to get a fiat onboarding URL
* Fix an issue with wrapping / unwrapping if an address contained uppercase chars
* Rename a constant
* Use a constant in a test
* Call Wyre’s API via our backend to generate Wyre’s Checkout URL
* Add back paymentMethod=debit-card, use a fallback URL if no url is returned from BE
* Fix a lint issue
* Refactor how to return Wyre’s Checkout URL
* Add 2 constants into a test file, refactoring
The `assert` module has two modes: "Legacy" and "strict". When using
strict mode, the "strict" version of each assertion method is implied.
Whereas in legacy mode, by default it will use the deprecated, "loose"
version of each assertion.
We now use strict mode everywhere. A few tests required updates where
they were asserting the wrong thing, and it was passing beforehand due
to the loose matching.
