Switched to react testing library for FE tests

[birtony]

Issue This PR Addresses

Type of Change

• Bugfix: Change which fixes an issue
• New Feature: Change which adds functionality
• Documentation Update: Change which improves documentation
• UI: Change which improves UI

Description

With using @testing-library/react, I was able to create a snapshot test for the AboutFooter component, which didn't work with react-test-renderer. I suggest that we switch to the first one instead.I have also added jest-update script to launch tests and update any outdated snapshots.

Checklist

• Quality: This PR builds and passes our npm test and works locally
• Tests: This PR includes thorough tests or an explanation of why it does not
• Screenshots: This PR includes screenshots or GIFs of the changes made or an explanation of why it does not (if applicable)
• Documentation: This PR includes updated/added documentation to user exposed functionality or configuration variables are added/changed or an explanation of why it does not(if applicable)

[humphd]

Nice, a few small things.