Bump sphinx-autodoc-typehints from 1.10.2 to 1.10.3 in /docs (#112)

Bumps [sphinx-autodoc-typehints](https://github.com/agronholm/sphinx-autodoc-typehints) from 1.10.2 to 1.10.3.
- [Release notes](https://github.com/agronholm/sphinx-autodoc-typehints/releases)
- [Changelog](https://github.com/agronholm/sphinx-autodoc-typehints/blob/master/CHANGELOG.rst)
- [Commits](agronholm/sphinx-autodoc-typehints@1.10.2...1.10.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

docs/requirements.txt

@@ -2,7 +2,7 @@
 # to generate documentation.
 
 sphinx==2.2.1
-sphinx_autodoc_typehints==1.10.2
+sphinx_autodoc_typehints==1.10.3
 recommonmark==0.6.0
 m2r==0.2.1
 tomlkit==0.5.8