Bump sqlalchemy-stubs from 0.3 to 0.4

Bumps [sqlalchemy-stubs](https://github.com/dropbox/sqlalchemy-stubs) from 0.3 to 0.4.
- [Release notes](https://github.com/dropbox/sqlalchemy-stubs/releases)
- [Commits](dropbox/sqlalchemy-stubs@v0.3...v0.4)

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

Author: dependabot[bot]

poetry.lock

@@ -37,7 +37,7 @@ python = "^3.7"
 SQLAlchemy = "^1.0"
 jsonschema = "^3"
 Jinja2 = "^2"
-sqlalchemy-stubs = "^0.3"
+sqlalchemy-stubs = ">=0.3,<0.5"
 typing_extensions = { version = "^3.7.4", python = "<3.8" }
 
 [tool.poetry.extras]