Add missing animations prop to options interface.

[multipolygon]

Hi, I can see options.animations being passed to new Animations(chart, animOpts) object here:
https://github.com/chartjs/chartjs-plugin-annotation/blob/v1.0.2/src/annotation.js#L140
(and I am actually using that option)

Animation:
https://github.com/chartjs/Chart.js/blob/a8337a3/types/animation.d.ts#L29

AnyObject:
https://github.com/chartjs/Chart.js/blob/a8337a32c976393e4648de633dcc49cdec2760b3/types/basic.d.ts#L2

[kurkle]

AnimationSpec might be better type for it.

Could also pass the TType, to make the scriptable context properly typed:

chartjs-plugin-annotation/types/index.d.ts

Lines 6 to 8 in 2d485b7

	interface PluginOptionsByType<TType extends ChartType> {
	annotation: AnnotationPluginOptions;
	}

Edit: actually the scriptable context is not same here, so maybe this comment should be ignored :)

[jbelien]

Since this commit, I have the following error in my project (when I try to upgrade this library):

error TS2741: Property 'animations' is missing in type '{ annotations: { [key: string]: AnnotationOptions; }; }' but required in type 'AnnotationPluginOptions'.

Shouldn't the animations property be optional ?

- animations: Record<string, unknown>,
+ animations?: Record<string, unknown>,

I don't find any documentation on this property in https://www.chartjs.org/chartjs-plugin-annotation/latest/ ; am I missing something ?

Thanks!