Panel #icons template causes vue-tsc compile error

[jbrunken]

Bug Report

PrimeVue: v3.8.2

Using the "#icons" template in a Panel causes vue-tsc compilation to fail with the following error:

 Element implicitly has an 'any' type because expression of type '"icons"' can't be used to index type '{ '': VNode<RendererNode, RendererElement, { [key: string]: any; }>[]; header: VNode<RendererNode, RendererElement, { ...; }>[]; }'.
  Property 'icons' does not exist on type '{ '': VNode<RendererNode, RendererElement, { [key: string]: any; }>[]; header: VNode<RendererNode, RendererElement, { ...; }>[]; }'.

The 3.8.2 release fixed a number of similar issues, but this one is still occurring.

Looking at Panel.d.ts, It doesn't have any definition for the "#icons" template.