Setup React Testing Library and write test for Header Component

[gibsonliketheguitar]

Description

• Install RTL and Jest
• Wrote initial test for Header component

Related Issues

Resolves #499

Acceptance Criteria

• [x] Install Jest and React Testing Library

• [x] Set up Jest

• [x] Choose one file in the website package and write tests for it as a starting point

• [x] Try to reach a 100% coverage for this file

Checklist

• [x] I have followed all conventions outlined in our documentation.
• [x] I have fully tested my changes and confirmed that all new and existing tests pass.
• [x] I have written meaningful commit messages for all changes.
• [x] I have linted and formatted my changes to follow the code style of this repository.
• [ ] I have updated our documentation, accordingly.
• [x] I have checked currently opened pull requests to ensure that there are no pending pull request for the same changes or issues.
• [x] I have confirmed that this pull request fully meets the acceptance criteria for all related issues listed above.

[netlify[bot]]

‼️ Deploy request for lucky-parking-staging rejected.

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🔨 Latest commit	0479a6b2ced38f7fdd54e86522a8fb9e9434342c

[gibsonliketheguitar]

Closing PR in favor of a new one . I have updated changes. I messed up with the commits