fix!: testing + linting technical debt

[jamesdh]

Basically just trying to get the validation environment in a healthy state. Lots of warnings lingering around as a result of half-completed updates, some misuse of types (or lack thereof), a number of dependencies that were badly in need of updating, and some of the necessary pain that comes as a result of finally updating them.

• Updates + pins a number of the key testing dependencies in use
• Extracts the Jest config from the package.json to its own jest.config.ts file. This is Jest's recommended approach, and with the Jest types makes configuration easier.
• Adds jest-fail-on-console. An earlier React 18 update caused the tests to output a pile of console warnings. Essentially, the work to truly upgrade to React 18 was incomplete. However, since the tests all still passed, everything appeared "green" when reviewing the PR in GitHub. This will change that going forward.
• Fixed usages of ReactDOMTestUtils.act. I'm not sure how some of those tests were passing to begin with, but the aforementioned dependency updates caused many of them to break. In the cases where we were attempting to validate expectations within the act() helper, I moved them outside of it and removed the needless await waitFor.
• Updates + pins some of the eslint + jest related dependencies since there were some bizarre linting errors after adding the jest.*.ts files to the tsconfig.
• Fixes some additional eslint warnings for misused any types.
• Fixes an eslint react version warning resulting from some lacking config

BEGIN_COMMIT_OVERRIDE
refactor!: add types (#945)

BREAKING-CHANGE: signIn and signOutRedirect now has it's own types.

feat: update + pin a key dependencies in use (#945)
fix: validation environment (#945)
END_COMMIT_OVERRIDE

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would update some of our documentation based on your changes. You can run yarn generate-docs to generate some!

[codecov]

Codecov Report

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❗ Current head 13a962f differs from pull request most recent head 0d68906. Consider uploading reports for the commit 0d68906 to get more accurate results

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[jamesdh]

Also I think it's safe to remove the update-docs bot at this point, since the docs job has been fixed.

[simenandre]

Thank you so much for this! 🚀