Merge pull request #12 from jtv8/python36-compatibility

Make backward compatible with Python 3.6

Author: kuimono

setup.py

@@ -19,5 +19,5 @@
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.6.1",
 )

tests/schema_classes/test_security_scheme.py

@@ -7,7 +7,7 @@ def test_security_scheme_issue_5():
     """https://github.com/kuimono/openapi-schema-pydantic/issues/5"""
 
     security_scheme_1 = SecurityScheme(type="openIdConnect", openIdConnectUrl="https://example.com/openIdConnect")
-    assert isinstance(security_scheme_1.openIdConnectUrl, AnyUrl)
+    assert isinstance(security_scheme_1.openIdConnectUrl, AnyUrl) or isinstance(security_scheme_1.openIdConnectUrl, str)
     assert security_scheme_1.json(by_alias=True, exclude_none=True) == (
         '{"type": "openIdConnect", "openIdConnectUrl": "https://example.com/openIdConnect"}'
     )

tests/util/test_pydantic_field.py

@@ -1,10 +1,21 @@
-from typing import Literal, Union
+from typing_extensions import Literal
+from typing import Union
 
 from pydantic import BaseModel, Field
 from pydantic.schema import schema
 
-from openapi_schema_pydantic import OpenAPI, Info, PathItem, Operation, RequestBody, MediaType, Response, Schema, \
-    Reference, Discriminator
+from openapi_schema_pydantic import (
+    OpenAPI,
+    Info,
+    PathItem,
+    Operation,
+    RequestBody,
+    MediaType,
+    Response,
+    Schema,
+    Reference,
+    Discriminator,
+)
 from openapi_schema_pydantic.util import PydanticSchema, construct_open_api_with_schema_class