Bump flake8 version and handle new lint errors (#1385)

moto/awslambda/models.py

@@ -265,14 +265,14 @@ class LambdaFunction(BaseModel):
     def convert(s):
         try:
             return str(s, encoding='utf-8')
-        except:
+        except Exception:
             return s
 
     @staticmethod
     def is_json(test_str):
         try:
             response = json.loads(test_str)
-        except:
+        except Exception:
             response = test_str
         return response
 

moto/awslambda/responses.py

@@ -4,7 +4,7 @@ import json
 
 try:
     from urllib import unquote
-except:
+except ImportError:
     from urllib.parse import unquote
 
 from moto.core.utils import amz_crc32, amzn_request_id