Don't use implicit optionals (#705)

* Turn off implicit-optional

* Change type annotations to use explicit optional

According to PEP 484, implicit Optional is no longer recommended.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

jwt/api_jws.py

@@ -132,8 +132,8 @@ def decode_complete(
         self,
         jwt: str,
         key: str = "",
-        algorithms: List[str] = None,
-        options: Dict = None,
+        algorithms: Optional[List[str]] = None,
+        options: Optional[Dict] = None,
         **kwargs,
     ) -> Dict[str, Any]:
         if options is None:
@@ -161,8 +161,8 @@ def decode(
         self,
         jwt: str,
         key: str = "",
-        algorithms: List[str] = None,
-        options: Dict = None,
+        algorithms: Optional[List[str]] = None,
+        options: Optional[Dict] = None,
         **kwargs,
     ) -> str:
         decoded = self.decode_complete(jwt, key, algorithms, options, **kwargs)

jwt/api_jwt.py

@@ -66,8 +66,8 @@ def decode_complete(
         self,
         jwt: str,
         key: str = "",
-        algorithms: List[str] = None,
-        options: Dict = None,
+        algorithms: Optional[List[str]] = None,
+        options: Optional[Dict] = None,
         **kwargs,
     ) -> Dict[str, Any]:
         if options is None:
@@ -112,8 +112,8 @@ def decode(
         self,
         jwt: str,
         key: str = "",
-        algorithms: List[str] = None,
-        options: Dict = None,
+        algorithms: Optional[List[str]] = None,
+        options: Optional[Dict] = None,
         **kwargs,
     ) -> Dict[str, Any]:
         decoded = self.decode_complete(jwt, key, algorithms, options, **kwargs)

setup.cfg

@@ -71,3 +71,4 @@ extend-ignore = E203, E501
 python_version = 3.6
 ignore_missing_imports = true
 warn_unused_ignores = true
+no_implicit_optional = true