[BUG] TypeError for tables with not_null and defaults parameters

[Artem-Ter]

Describe the bug
Creating a table in database using not_null = set(...) and/or defaults=dict(...) parameters you get TypeError: unhashable type: 'set' or 'dict' accordingly

Minimal Reproducible Example

import fasthml.common as fh

db = fh.database('test.db')

users = db.t.users

users.drop()
users.create(
            {
                "id":int,
                "name":str,
                "email":str,
                "pwd":str,
                "phone":str,
                "organization":str,
                "role":int
            },
            pk='id',
            not_null={'email'},
            defaults={'role': 1},
        )

Expected behavior
Create table with defaults and not null constraints

Environment Information

• fastlite version: "0.0.11"
• fastcore version: "1.7.14"
• fasthtml version: "0.6.10"

Confirmation
Please confirm the following:

• I have read the FAQ (https://docs.fastht.ml/explains/faq.html)
• I have provided a minimal reproducible example
• I have included the versions of fastlite, fastcore, and fasthtml
• I understand that this is a volunteer open source project with no commercial support.