fixed starlette dependency and deprecations

Author: eadwinCode

ellar/compatible/contextmanager.py

@@ -1,6 +1,6 @@
 import sys
 
-if sys.version_info >= (3, 7):
+if sys.version_info >= (3, 7):  # pragma: no cover
     from contextlib import asynccontextmanager as asynccontextmanager
 else:
     from contextlib2 import asynccontextmanager as asynccontextmanager  # noqa

ellar/core/middleware/__init__.py

@@ -1,4 +1,5 @@
-from starlette.exceptions import ExceptionMiddleware
+import sys
+
 from starlette.middleware import Middleware as Middleware
 from starlette.middleware.authentication import AuthenticationMiddleware
 from starlette.middleware.base import BaseHTTPMiddleware
@@ -16,6 +17,12 @@
 from .di import RequestServiceProviderMiddleware
 from .versioning import RequestVersioningMiddleware
 
+if sys.version_info >= (3, 7):  # pragma: no cover
+    from starlette.middleware.exceptions import ExceptionMiddleware
+else:
+    from starlette.exceptions import ExceptionMiddleware  # type: ignore
+
+
 __all__ = [
     "Middleware",
     "AuthenticationMiddleware",

pyproject.toml

@@ -44,7 +44,8 @@ dependencies = [
     "injector",
     "injector; python_version >= '3.7'",
     "injector <= 0.19.0; python_version < '3.7'",
-    "starlette >= 0.19.0",
+    "starlette >= 0.20.0; python_version >= '3.7'",
+    "starlette == 0.19.1; python_version < '3.7'",
     "pydantic",
     "jinja2",
     "typer"