chore: add example tests

[grounded042]

Description

This PR adds tests for the examples so users can follow along on how to test things.

References

This started from #154

Testing

This is just adding tests.

• [x] This change adds test coverage for new/changed/fixed functionality

Checklist

• [x] I have read and agreed to the terms within the Auth0 Code of Conduct.
• [x] I have read the Auth0 General Contribution Guidelines.
• [x] I have reviewed my own code beforehand.
• [ ] I have added documentation for new/changed functionality in this PR.
• [x] All active GitHub checks for tests, formatting, and security are passing.
• [x] The correct base branch is being used, if not master.

[Widcket]

cc @sergiughf

[codecov-commenter]

Codecov Report

Base: 92.61% // Head: 77.66% // Decreases project coverage by -14.95% :warning:

Coverage data is based on head (cf6f758) compared to base (7914559). Patch coverage: 64.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #157       +/-   ##
===========================================
- Coverage   92.61%   77.66%   -14.96%     
===========================================
  Files           7        9        +2     
  Lines         271      385      +114     
===========================================
+ Hits          251      299       +48     
- Misses         16       73       +57     
- Partials        4       13        +9     

Impacted Files	Coverage Δ
examples/http-example/main.go	36.36% <60.00%> (ø)
examples/http-jwks-example/main.go	54.05% <70.00%> (ø)

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[grounded042]

Sorry, I've been a little pre-occupied with other work. I'll circle back around to this soon.