Add 'make update-github-branch-protection-rules'

This is pretty terrible, and it uses the deprecated 'contexts' instead
of the 'checks', but the API has an endpoint for setting just contexts,
and it doesn't have an endpoint for setting checks.

Makefile

@@ -42,6 +42,54 @@ isort:                          ##: check for incorrect import ordering
 mypy:                           ##: check for type errors
 	tox -e mypy
 
+##: GitHub maintenance
+
+.PHONY: update-github-branch-protection-rules
+
+update-github-branch-protection-rules:  ##: update GitHub branch protection rules
+	gh api -X PUT -H "Accept: application/vnd.github+json" \
+		-H "X-GitHub-Api-Version: 2022-11-28" \
+		/repos/mgedmin/check-manifest/branches/master/protection/required_status_checks/contexts \
+		-f "contexts[]=check-manifest"                         \
+		-f "contexts[]=check-python-versions"                  \
+		-f "contexts[]=flake8"                                 \
+		-f "contexts[]=isort"                                  \
+		-f "contexts[]=mypy"                                   \
+		-f "contexts[]=Python 3.7, bzr"                        \
+		-f "contexts[]=Python 3.7, git"                        \
+		-f "contexts[]=Python 3.7, hg"                         \
+		-f "contexts[]=Python 3.7, svn"                        \
+		-f "contexts[]=Python 3.8, bzr"                        \
+		-f "contexts[]=Python 3.8, git"                        \
+		-f "contexts[]=Python 3.8, hg"                         \
+		-f "contexts[]=Python 3.8, svn"                        \
+		-f "contexts[]=Python 3.9, bzr"                        \
+		-f "contexts[]=Python 3.9, git"                        \
+		-f "contexts[]=Python 3.9, hg"                         \
+		-f "contexts[]=Python 3.9, svn"                        \
+		-f "contexts[]=Python 3.10, bzr"                       \
+		-f "contexts[]=Python 3.10, git"                       \
+		-f "contexts[]=Python 3.10, hg"                        \
+		-f "contexts[]=Python 3.10, svn"                       \
+		-f "contexts[]=Python 3.11, bzr"                       \
+		-f "contexts[]=Python 3.11, git"                       \
+		-f "contexts[]=Python 3.11, hg"                        \
+		-f "contexts[]=Python 3.11, svn"                       \
+		-f "contexts[]=Python 3.12, bzr"                       \
+		-f "contexts[]=Python 3.12, git"                       \
+		-f "contexts[]=Python 3.12, hg"                        \
+		-f "contexts[]=Python 3.12, svn"                       \
+		-f "contexts[]=Python 3.13, bzr"                       \
+		-f "contexts[]=Python 3.13, git"                       \
+		-f "contexts[]=Python 3.13, hg"                        \
+		-f "contexts[]=Python 3.13, svn"                       \
+		-f "contexts[]=Python pypy3.10, bzr"                   \
+		-f "contexts[]=Python pypy3.10, git"                   \
+		-f "contexts[]=Python pypy3.10, hg"                    \
+		-f "contexts[]=Python pypy3.10, svn"                   \
+		-f "contexts[]=continuous-integration/appveyor/branch" \
+		-f "contexts[]=continuous-integration/appveyor/pr"
+
 ##: Releasing
 
 .PHONY: distcheck