Fix `command(:create, result: :many)` for combines

[dgollahon]

• In ruby 3.x the result: :many will get forwarded incorrectly if there is a combine. That is, something like relation.command(:create, result: :many) will work but relation.combine(:child_relation).command(:create, result: :many) will raise ArgumentError: wrong number of arguments (given 2, expected 1). This fixes is it (I have tested by doing the following on my codebase ROM::Relation::Combined.__send__(:ruby2_keywords, :command)).

[dgollahon]

NOTE: I have not added any tests here because it was too much effort and I had too little time to figure out how to set up a local environment that worked. I would appreciate either someone else adding a test or pointers for getting set up.

[flash-gordon]

I think we can drop ruby 2.x safely

[katafrakt]

I see 2.x was already dropped from rom-sql. So should we do the same here? I can create the PR if needed.

[dgollahon]

I see 2.x was already dropped from rom-sql. So should we do the same here? I can create the PR if needed.

To be clear, this isn't directly an issue of 2.x support. This doesn't work on 3.x, using 2.x style keywords happens to fix it.

[solnic]

Thanks for the PR! So you're saying that without this, it's broken under 3.x?

[solnic]

I think we can drop ruby 2.x safely

Yes let's do this

[dgollahon]

Thanks for the PR! So you're saying that without this, it's broken under 3.x?

Correct, when combined with #combine.

[solnic]

How about we just ditch 2.x and fix signatures to be command(type, **opts)?