fix(mypy): no implicit optional

Author: Michael Brewer

aws_lambda_powertools/tracing/tracer.py

@@ -520,7 +520,7 @@ def _decorate_async_function(
         method: Callable,
         capture_response: Optional[Union[bool, str]] = None,
         capture_error: Optional[Union[bool, str]] = None,
-        method_name: str = None,
+        method_name: Optional[str] = None,
     ):
         @functools.wraps(method)
         async def decorate(*args, **kwargs):
@@ -547,7 +547,7 @@ def _decorate_generator_function(
         method: Callable,
         capture_response: Optional[Union[bool, str]] = None,
         capture_error: Optional[Union[bool, str]] = None,
-        method_name: str = None,
+        method_name: Optional[str] = None,
     ):
         @functools.wraps(method)
         def decorate(*args, **kwargs):

aws_lambda_powertools/utilities/validation/base.py

@@ -1,9 +1,9 @@
 import logging
 from typing import Any, Dict, Optional, Union
 
-import fastjsonschema
+import fastjsonschema  # type: ignore
 import jmespath
-from jmespath.exceptions import LexerError
+from jmespath.exceptions import LexerError  # type: ignore
 
 from aws_lambda_powertools.shared.jmespath_functions import PowertoolsFunctions