Update tests for Marshmallow 3

Fixes #3

app/fizz/fizzbaz/controller_test.py

@@ -37,7 +37,7 @@ class TestFizzbazResource:
                         make_fizzbaz(456, name="Test Fizzbaz 2"),
                     ]
                 )
-                .data
+                
             )
             for r in results:
                 assert r in expected
@@ -53,7 +53,7 @@ class TestFizzbazResource:
             expected = (
                 FizzbazSchema()
                 .dump(Fizzbaz(name=payload["name"], purpose=payload["purpose"]))
-                .data
+                
             )
             assert result == expected
 
@@ -94,6 +94,6 @@ class TestFizzbazIdResource:
                 .dump(
                     Fizzbaz(fizzbaz_id=123, name="New Fizzbaz", purpose="New purpose")
                 )
-                .data
+                
             )
             assert result == expected

app/fizz/fizzbaz/schema_test.py

@@ -17,7 +17,7 @@ def test_FizzbazSchema_create(schema: FizzbazSchema):
 def test_FizzbazSchema_works(schema: FizzbazSchema):
     params: FizzbazInterface = schema.load(
         {"fizzbazId": "123", "name": "Test fizzbaz", "purpose": "Test purpose"}
-    ).data
+    )
     fizzbaz = Fizzbaz(**params)
 
     assert fizzbaz.fizzbaz_id == 123