[CI] Run cashtab components tests on CI

Summary:
Adds the jest-junit package to the dev dependencies, and run the tests
on CI.

Test Plan:

./contrib/teamcity/build-configurations.py cashtab-components-tests

Reviewers: #bitcoin_abc, josephroyking

Reviewed By: #bitcoin_abc, josephroyking

Differential Revision: https://reviews.bitcoinabc.org/D9231