feat: re-add WithCustomClientOption, useful for unit testing.

[netrebel]

Hi,

Could you re-add WithCustomClientOption?

My existing unit tests make use of WithEndpoint with a httptest.NewServer URL. But it needs to be used in combination with option.WithoutAuthentication() so that the client can be initialized correctly (see example in README).

Doing this, there's no need to have a local dummy Credentials file for unit testing.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 28.14%. Comparing base (5a7fb86) to head (b5725bc).
Report is 42 commits behind head on master.

Files	Patch %	Lines
option.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #51       +/-   ##
===========================================
- Coverage   84.97%   28.14%   -56.83%     
===========================================
  Files           5        3        -2     
  Lines         213      135       -78     
===========================================
- Hits          181       38      -143     
- Misses         24       89       +65     
  Partials        8        8               

Flag	Coverage Δ
go-1.21	28.14% <0.00%> (?)
go-1.22	28.14% <0.00%> (?)
ubuntu-latest	28.14% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[appleboy]

@netrebel Thnaks.