Switch to new authentication format for PyGithub

PyGithub has deprecated passing the token directly as a positional
argument when initializing the client.

This commit updates all occurrences to use the new
`Github(auth=github.Auth.Token(...))` format.

commodore/dependency_syncer.py

@@ -45,7 +45,7 @@ def sync_dependencies(
  deps = read_dependency_list(dependency_list, depfilter)
  dep_count = len(deps)
 
- gh = github.Github(config.github_token)
+ gh = github.Github(auth=github.Auth.Token(config.github_token))
  # Keep track of how many PRs we've created to better avoid running into rate limits
  update_count = 0
  for i, dn in enumerate(deps, start=1):

tests/test_dependency_sync.py

@@ -248,7 +248,7 @@ def test_ensure_pr(tmp_path: Path, config: Config, pr_exists: bool):
  pname = "projectsyn/package-foo"
  dependency_syncer.ensure_branch(p, "template-sync")
 
- gh = github.Github(config.github_token)
+ gh = github.Github(auth=github.Auth.Token(config.github_token))
  gr = gh.get_repo(pname)
 
  msg = dependency_syncer.ensure_pr(
@@ -286,7 +286,7 @@ def test_ensure_pr_no_permission(tmp_path: Path, config: Config, pr_exists: bool
  pname = "projectsyn/package-foo"
  dependency_syncer.ensure_branch(p, "template-sync")
 
- gh = github.Github(config.github_token)
+ gh = github.Github(auth=github.Auth.Token(config.github_token))
  gr = gh.get_repo(pname)
 
  msg = dependency_syncer.ensure_pr(p, pname, gr, "template-sync", [], "")
@@ -323,7 +323,7 @@ def test_ensure_pr_comment(tmp_path: Path, config: Config):
  pname = "projectsyn/package-foo"
  dependency_syncer.ensure_branch(p, "template-sync")
 
- gh = github.Github(config.github_token)
+ gh = github.Github(auth=github.Auth.Token(config.github_token))
  gr = gh.get_repo(pname)
 
  msg = dependency_syncer.ensure_pr(