Consider contractors and students as external in metrics.

[dblock]

Description

Consider contractors and students as external in metrics.

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[codecov]

Codecov Report

Attention: Patch coverage is 43.93939% with 37 lines in your changes are missing coverage. Please review.

Project coverage is 75.98%. Comparing base (25c77e2) to head (4a7a5d2).

Files	Patch %	Lines
lib/github/buckets.rb	0.00%	11 Missing ⚠️
lib/github/repos.rb	23.07%	10 Missing ⚠️
lib/github/data.rb	64.00%	9 Missing ⚠️
lib/github/maintainers.rb	44.44%	5 Missing ⚠️
lib/github/contributors.rb	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #79      +/-   ##
==========================================
- Coverage   77.47%   75.98%   -1.49%     
==========================================
  Files          57       57              
  Lines         870      891      +21     
==========================================
+ Hits          674      677       +3     
- Misses        196      214      +18     

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