Converting array of array or list of lists

[dmtrrk]

This package contains F# lists converter. But it does not work with included arrays:

type MyType () = 
    member val Items: int array array = [||] with get, set

for such JSON

"{ \"items\": [[1, 2, 3], [4, 5, 6]] }"

This will fail with

System.NotSupportedException: Collection was of a fixed size

[mbuhot]

@deeptowncitizen does that example work with C#?
It looks like the same error as this issue fixed by this PR, but I'm not sure if that fix is in .net core 3.1, or we have to wait for .net 5.0.