Marshmallow OpenApiConverter does not support str openapi_version

[Mounier Florian]

The mashmallow ext documentation says

openapi_version (Version) – The OpenAPI version to use. Should be in the form ‘2.x’ or ‘3.x.x’ to comply with the OpenAPI standard.

but in APISpec str is supported which leads to confusion:

openapi_version (str) – OpenAPI Specification version. Should be in the form ‘2.x’ or ‘3.x.x’ to comply with the OpenAPI standard.

This commit has removed the conversion from str to version instance in marshmallow ext:
d9e7ef9#diff-d2965e63925ff25611aef4a29719e18095c4a035c9a855e65d4d8ea7908298b8L54-L60

which when using str version leads to errors like AttributeError: 'str' object has no attribute 'major' here https://github.com/marshmallow-code/apispec/blob/dev/src/apispec/ext/marshmallow/openapi.py#L191 in version 6.0.1

Is it the desired behavior?
Thanks

[Jérôme Lafréchoux]

Right. Sorry about that. Would you like to send a fix (cast to Version)?

[Mounier Florian]

Why not :)

[Mounier Florian]

Here you go #811

[Jérôme Lafréchoux]

Fix released in 6.0.2!