Bump starlette from 0.26.1 to 0.27.0

Bumps [starlette](https://github.com/encode/starlette) from 0.26.1 to 0.27.0.
- [Release notes](https://github.com/encode/starlette/releases)
- [Changelog](https://github.com/encode/starlette/blob/master/docs/release-notes.md)
- [Commits](encode/starlette@0.26.1...0.27.0)

---
updated-dependencies:
- dependency-name: starlette
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -71,7 +71,7 @@ jsonschema-spec = "^0.1.1"
 backports-cached-property = {version = "^1.0.2", python = "<3.8" }
 asgiref = "^3.6.0"
 jsonschema = "^4.17.3"
-starlette = {version = "^0.26.1", optional = true}
+starlette = {version = ">=0.26.1,<0.28.0", optional = true}
 
 [tool.poetry.extras]
 django = ["django"]