Incorrect type for Filters in Typescript perspective-viewer/index.d.ts

[nekw]

Bug Report

In https://github.com/finos/perspective/blob/master/packages/perspective-viewer/index.d.ts
line 31:
export type Filters = Array<[string, string, string]>;

I think this line should change to below or better types:
export type Filters = Array<[string, string, string | string[]>;

For example, the filters could be in following case involving 'in' operator
[
['field A', 'in', ['value 1', 'value2', 'value3']]
['field B', '==', 'value 4']
]

Steps to Reproduce:

N/A

Expected Result:

export type Filters = Array<[string, string, string | string[]>;

Actual Result:

export type Filters = Array<[string, string, string>;

Environment:

Finos/Perspective 0.10.0, ReactJS, Typescript