Update databases requirement from <0.5.1,>=0.3.2 to >=0.3.2,<0.5.2

Updates the requirements on [databases](https://github.com/encode/databases) to permit the latest version.
- [Release notes](https://github.com/encode/databases/releases)
- [Changelog](https://github.com/encode/databases/blob/master/CHANGELOG.md)
- [Commits](https://github.com/encode/databases/compare/0.3.2...0.5.1)

---
updated-dependencies:
- dependency-name: databases
  dependency-type: direct:production
...

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

setup.py

@@ -63,7 +63,7 @@ setup(
     python_requires=">=3.6",
     data_files=[("", ["LICENSE.md"])],
     install_requires=[
-        "databases>=0.3.2,<0.5.1",
+        "databases>=0.3.2,<0.5.2",
         "pydantic>=1.6.1,!=1.7,!=1.7.1,!=1.7.2,!=1.7.3,!=1.8,!=1.8.1,<=1.8.2",
         "sqlalchemy>=1.3.18,<=1.4.23",
         "typing_extensions>=3.7,<3.10.0.3",