[Cashtab] Add unit tests for parseAddressForParams
Summary: As per feedback from D14116, this diff adds unit tests to the existing parseAddressForParams function before moving it out of Ticker.js in D14116.
Test Plan: npm test
Reviewers: bytesofman, Fabien, #bitcoin_abc
Reviewed By: Fabien, #bitcoin_abc
Differential Revision: https://reviews.bitcoinabc.org/D14117