VectorImageLayer options don't accept flat styles

[janruo]

Describe the bug

VectorLayer options type accepts a StyleLike | FlatStyleLike | null | undefined.
VectorImageLayer options type accepts a StyleLike | null | undefined.

openlayers/src/ol/layer/BaseVector.js

Line 51 in 474b201

* @property {import("../style/Style.js").StyleLike|import("../style/flat.js").FlatStyleLike|null} [style] Layer style. When set to `null`, only

openlayers/src/ol/layer/VectorImage.js

Line 43 in 474b201

* @property {import("../style/Style.js").StyleLike|null} [style] Layer style. When set to `null`, only

However, VectorImageLayer seems to actually support flat styles, so it looks like FlatStyleLike is just missing from the type definition.

To Reproduce

new VectorImageLayer({
    style: {
        "fill-color": "#0000ff11",
        "stroke-color": "blue"
    } // as any <- forcing it to accept the style works
});

Object literal may only specify known properties, and '"fill-color"' does not exist in type 'StyleLike'.ts(2353)

Expected behavior
Both VectorLayer and VectorImageLayer options should accept flat styles.

[janruo]

Just noticed that the declutter option is also a bit too narrow in VectorImageLayer options.

Both VectorImageLayer and VectorLayer inherit from BaseVectorLayer, so this should work, right?

import { Options as BaseVectorLayerOptions } from "ol/layer/BaseVector";
import VectorImageLayer from "ol/layer/VectorImage";
import VectorSource from "ol/source/Vector";

const options: BaseVectorLayerOptions<VectorSource> = {};

new VectorImageLayer(options);

  Types of property 'declutter' are incompatible.
    Type 'string | number | boolean | undefined' is not assignable to type 'boolean | undefined'.
      Type 'string' is not assignable to type 'boolean | undefined'.ts(2345)

[ahocevar]

Are you able to provide a pull request with the types fixed?

[janruo]

Sure, I'll see what I can do some time next week.