fix!: Add field PerPage to OrganizationsListOptions

[alexandear]

BREAKING CHANGE: OrganizationsListOptions now contains only PerPage instead of ListOptions.

Updates #3976

We could build an iterator for ListAll using the Since field, but it is not very useful. ListAllIter would return all organizations across GitHub, which is a large result set.

[alexandear]

Created issue #3987 about failing TestDo_rateLimit_abuseRateLimitError_xRateLimitReset.

[gmlewis]

Thank you, @alexandear!

And yes, there will be inconsistencies in this repo with the handling of url: struct tags. We should probably work on making them consistent and NOT use pointers for these values, which would also help to make it clearer what is a URL param and what is not.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.52%. Comparing base (e5024aa) to head (485d0ac).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3986      +/-   ##
==========================================
- Coverage   93.53%   93.52%   -0.01%     
==========================================
  Files         207      207              
  Lines       17610    17593      -17     
==========================================
- Hits        16471    16454      -17     
  Misses        938      938              
  Partials      201      201              

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[gmlewis]

Excellent! Thank you, @alexandear!
LGTM.
Awaiting second LGTM+Approval from any other contributor to this repo before merging.

cc: @stevehipwell - @zyfy29 - @Not-Dhananjay-Mishra

[Not-Dhananjay-Mishra]

LGTM

[gmlewis]

Thank you, @Not-Dhananjay-Mishra!
Merging.