`build_json_schema()` fails for type defined with `type` keyword

[NiklasRosenstein]

• mashumaro version: 3.16
• Python version: 3.13.5
• Operating System: Ubuntu 24.04

Description

Mashumaro fails to generate the schema when encountering a field that is annotated with a type that was declared with the type keyword.

What I Did

type B = dict[str, str]
print(build_json_schema(B).to_json())

Traceback:

  File "venv/lib/python3.13/site-packages/mashumaro/jsonschema/builder.py", line 51, in build_json_schema
    schema = get_schema(instance, context, with_dialect_uri=with_dialect_uri)
  File "venv/lib/python3.13/site-packages/mashumaro/jsonschema/schema.py", line 270, in get_schema
    schema = schema_creator(instance, ctx)
  File "venv/lib/python3.13/site-packages/mashumaro/jsonschema/schema.py", line 747, in on_collection
    if not issubclass(instance.origin_type, Collection):
           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen abc>", line 123, in __subclasscheck__
TypeError: issubclass() arg 1 must be a class

The same error also occurs when using the type in a field for a TypedDict or @dataclass.

[Fatal1ty]

Hi @NiklasRosenstein

Thank you for the bug report. I just encountered this in my code and quickly fixed it. The release will be coming soon.