mergeStatic() does not work with arbitrary amount of parameters

[felixfbecker]

IxJS version:

Code to reproduce:

let arr: AsyncIterable<any>[]
mergeStatic(...arr)

Expected behavior:
Should compile

Actual behavior:
Fails with

[ts] Expected 1-6 arguments, but got 0 or more. [2556]
merge.ts(86, 32): An argument for 'v1' was not provided.

Additional information:
Workaround: use new MergeAsyncIterable(arr)