Improve allowMultipleConnections together with InterfaceTypes

[newcat]

Hi,
I've noticed an oddity when using Interface Types with allowMultipleConnections.

So let's say I'd like my custom interface to receive strings, so I use new NodeInterfaceType<string>("custom").
Then I set this type and allow multiple connections:
new NodeInterface<string[]>("Input", []).use(allowMultipleConnections).use(setType, customType)

Then I'll have a typescript error about the mismatch between 'string' and 'string[]':
Argument of type 'NodeInterfaceType<string>' is not assignable to parameter of type 'NodeInterfaceType<string[]>'.ts(2345)

I could change my type to NodeInterfaceType<string[]>, but then, if I wanted an output node of the same 'custom' type, that will also be 'string[]' instead of 'string' which seems wrong.

What's the recommended way to do this? Am I supposed to put the [] into the interface definition?

Originally posted by @hthomas92 in #219 (comment)

[newcat]

Fixed in v2.3.0