Bump homeassistant from 2021.1.3 to 2021.1.4

Bumps [homeassistant](https://github.com/home-assistant/core) from 2021.1.3 to 2021.1.4.
- [Release notes](https://github.com/home-assistant/core/releases)
- [Changelog](https://github.com/home-assistant/core/blob/dev/azure-pipelines-release.yml)
- [Commits](https://github.com/home-assistant/core/compare/2021.1.3...2021.1.4)

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

requirements_test.txt

@@ -6,4 +6,4 @@ pydocstyle==5.1.1
 cryptography==3.2
 pylint==2.6.0
 pylint-strict-informational==0.1
-homeassistant==2021.1.3
+homeassistant==2021.1.4