:-((( DIRTY HACK hotfix due to TS not supporting symbol as a type i…

…n latest npm TS release (3.5.2): see also microsoft/TypeScript#1863 + microsoft/TypeScript#24587 + https://www.typescriptlang.org/docs/handbook/symbols.html

src/vnode.ts

@@ -8,7 +8,7 @@ import {Props} from './modules/props'
 import {Dataset} from './modules/dataset'
 import {Hero} from './modules/hero'
 
-export type Key = string | number | symbol;
+export type Key = string | number /* | symbol */;
 
 export interface VNode {
   sel: string | undefined;