0.8.0

For custom converters, we can now choose if they should be mandatory or optional.
Up to now, they were only optional.

This is an API-breaking change. So if you'd like to update old (<0.8.0) code, you need to change this:

@type_checked_constructor(converters={'foo': conv_foo})
@dataclass
class Foo:
    foo: ...

to that:

@type_checked_constructor(converters={'foo': optional_converter(conv_foo)})
@dataclass
class Foo:
    foo: ...

because the default (and only) behavior of converters was to be optional.

Now, there is a new option to use optional_converter instead.