fix: mypy fixes

netsuite/soap_api/client.py

@@ -23,9 +23,9 @@ def __init__(
         self,
         config: Config,
         *,
-        version: str = None,
-        wsdl_url: str = None,
-        cache: zeep.cache.Base = None,
+        version: Optional[str] = None,
+        wsdl_url: Optional[str] = None,
+        cache: Optional[zeep.cache.Base] = None,
     ) -> None:
         self._ensure_required_dependencies()
         if version is not None:
@@ -394,7 +394,7 @@ async def getList(
         extract=lambda resp: resp["record"],
     )
     async def get(
-        self, recordType: str, *, internalId: int = None, externalId: str = None
+        self, recordType: str, *, internalId: Optional[int] = None, externalId: Optional[str] = None
     ) -> zeep.xsd.CompoundValue:
         """Get a single record"""
         if len([v for v in (internalId, externalId) if v is not None]) != 1:
@@ -480,7 +480,7 @@ async def getItemAvailability(
         *,
         internalIds: Optional[Sequence[int]] = None,
         externalIds: Optional[Sequence[str]] = None,
-        lastQtyAvailableChange: datetime = None,
+        lastQtyAvailableChange: Optional[datetime] = None,
     ) -> List[Dict]:
         if internalIds is None:
             internalIds = []

netsuite/soap_api/decorators.py

@@ -1,5 +1,5 @@
 from functools import wraps
-from typing import Any, Callable
+from typing import Optional, Any, Callable
 
 from .. import constants
 from . import zeep
@@ -9,8 +9,8 @@
 
 
 def WebServiceCall(
-    path: str = None,
-    extract: Callable = None,
+    path: Optional[str] = None,
+    extract: Optional[Callable] = None,
     *,
     default: Any = constants.NOT_SET,
 ) -> Callable: