Bump version of go-github to v57.0.0

[gmlewis]

This release contains the following breaking API change:

• Change PushEvent.Pusher type to CommitAuthor #2999

...and the following additional changes:

• Bump go-github from v55 to v56 in /scrape #2962
• Add support for packages IP address for APIMeta #2964
• Bump github.com/google/go-cmp from 0.5.9 to 0.6.0 #2967
• Move RateLimits method to a service #2969
• Add nil check in ErrorResponse.Error method #2971
• Lint godoc comments #2972
• Add referenced workflows to WorkflowRun #2975
• Use metadata to reconcile go-github with GitHub's OpenAPI descriptions #2919
• Fix branch protection request fields #2977
• Add dependabot alert update endpoint #2981
• Bump golang.org/x/sync from 0.4.0 to 0.5.0 in /tools #2990
• Deprecate RepositoriesService.List #2988
• Add support for Required Workflows #2979
• Implement Custom Properties #2986
• Bump golang.org/x/net from 0.17.0 to 0.18.0 in /scrape #2991
• Add default branch to repository edit event #2995
• Add Draft to Issue type #2997
• Fix secondary rate limits URL #3001
• Bump golang.org/x/net from 0.18.0 to 0.19.0 in /scrape #3003
• Implement global security advisories API #2993

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (50d4db2) 97.91% compared to head (06a34f5) 97.91%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3009   +/-   ##
=======================================
  Coverage   97.91%   97.91%           
=======================================
  Files         150      150           
  Lines       12980    12980           
=======================================
  Hits        12710    12710           
  Misses        192      192           
  Partials       78       78           

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