fix(deps): bump shellingham from 1.5.1 to 1.5.3 (#246)

Bumps [shellingham](https://github.com/sarugaku/shellingham) from 1.5.1 to 1.5.3.
- [Release notes](https://github.com/sarugaku/shellingham/releases)
- [Changelog](https://github.com/sarugaku/shellingham/blob/master/CHANGELOG.rst)
- [Commits](sarugaku/shellingham@1.5.1...1.5.3)

---
updated-dependencies:
- dependency-name: shellingham
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -41,7 +41,7 @@
         "setuptools==68.1.2",
         "requests==2.31.0",
         "slack-sdk==3.21.3",
-        "shellingham==1.5.1",
+        "shellingham==1.5.3",
         "wheel==0.41.1",
     ],
     extras_require={