Add test cases to verify that error responses contain status code

[AGMETEOR]

Fixes #912

[AGMETEOR]

Hi @gmlewis , I hope you has a great weekend. Here's the PR for issue 912

[cpanato]

LGTM

[codecov]

Codecov Report

Merging #2093 (27f7970) into master (a0448fc) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2093      +/-   ##
==========================================
+ Coverage   97.75%   97.77%   +0.02%     
==========================================
  Files         107      109       +2     
  Lines        9600     9724     +124     
==========================================
+ Hits         9384     9508     +124     
  Misses        150      150              
  Partials       66       66              

Impacted Files	Coverage Δ
github/event.go	100.00% <0.00%> (ø)
github/messages.go	100.00% <0.00%> (ø)
github/actions_runner_groups.go	100.00% <0.00%> (ø)
github/actions_workflow_runs.go	100.00% <0.00%> (ø)
github/orgs_hooks_deliveries.go	100.00% <0.00%> (ø)
github/repos_community_health.go	100.00% <0.00%> (ø)
github/repos_autolinks.go	100.00% <0.00%> (ø)
github/scim.go	100.00% <0.00%> (ø)
github/repos.go	98.64% <0.00%> (+<0.01%)	⬆️
github/github.go	97.58% <0.00%> (+<0.01%)	⬆️

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[gmlewis]

Thank you, @AGMETEOR !
LGTM.
Thank you, also, @cpanato for the review! We appreciate it.
Merging.