Bump pygithub from 1.39 to 1.51

[dependabot-preview]

Bumps pygithub from 1.39 to 1.51.

Release notes

Sourced from pygithub's releases.

v1.51

• Type stubs are now packaged with the build (#1489) (6eba4506)
• Travis CI is now dropped in favor of Github workflow (#1488) (d6e77ba1)
• Get the project column by id (#1466) (63855409)

v1.50

New features

• PyGithub now supports type checking thanks to (#1231) (91433fe9)
• Slack is now the main channel of communication rather than Gitter (6a6e7c26)
• Ability to retrieve public events (#1481) (5cf9950b)
• Add and handle the maintainer_can_modify attribute in PullRequest (#1465) (e0997b43)
• List matching references (#1471) (d3bc6a5c)
• Add create_repository_dispatch (#1449) (edcbdfda)
• Add some Organization and Repository attributes. (#1468) (3ab97d61)
• Add create project method (801ea385)

Bug Fixes & Improvements

• Drop use of shadow-cat for draft PRs (#1469) (84bb69ab)
• AuthenticatedUser.get_organization_membership() should be str (#1473) (38b34db5)
• Drop documentation for len() of PaginatedList (#1470) (70462598)
• Fix param name of projectcard's move function (#1451) (bafc4efc)
• Correct typos found with codespell (#1467) (83bef0f7)
• Export IncompletableObject in the github namespace (#1450) (0ebdbb26)
• Add GitHub Action workflow for checks (#1464) (f1401c15)
• Drop unneeded ignore rule for flake8 (#1454) (b4ca9177)
• Use pytest to parametrize tests (#1438) (d2e9bd69)

v1.47

Bug Fixes & Improvements

• Add support to edit and delete a project (#1434) (f11f7395)
• Add method for fetching pull requests associated with a commit (#1433) (0c55381b)
• Add "get_repo_permission" to Team class (#1416) (219bde53)
• Add list projects support, update tests (#1431) (e44d11d5)
• Don't transform completely in PullRequest.*assignees (#1428) (b1c35499)
• Add create_project support, add tests (#1429) (bf62f752)
• Add draft attribute, update test (bd285248)
• Docstring for Repository.create_git_tag_and_release (#1425) (bfeacded)
• Create a tox docs environment (#1426) (b30c09aa)
• Add Deployments API (#1424) (3d93ee1c)
• Add support for editing project cards (#1418) (425280ce)
• Add draft flag parameter, update tests (bd0211eb)
• Switch to using pytest (#1423) (c822dd1c)
• Fix GitMembership with a hammer (#1420) (f2939eb7)
• Add support to reply to a Pull request comment (#1374) (1c82573d)
• PullRequest.update_branch(): allow expected_head_sha to be empty (#1412) (806130e9)
• Implement ProjectCard.delete() (#1417) (aeb27b78)
• Add pre-commit plugin for black/isort/flake8 (#1398) (08b1c474)

... (truncated)

Commits

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