Fix reference to deprecated handlebars type (TypeStrong#1022)

Author: adidahiya

src/lib/output/events.ts

@@ -1,3 +1,4 @@
+import { TemplateDelegate } from 'handlebars';
 import * as Path from 'path';
 
 import { Event } from '../utils/events';
@@ -110,7 +111,7 @@ export class PageEvent extends Event {
     /**
      * The template that should be used to render this page.
      */
-    template?: HandlebarsTemplateDelegate;
+    template?: TemplateDelegate;
 
     /**
      * The name of the template that should be used to render this page.

src/lib/output/utils/resources/templates.ts

@@ -3,10 +3,10 @@ import * as Handlebars from 'handlebars';
 import { readFile } from '../../../utils/fs';
 import { ResourceStack, Resource } from './stack';
 
-export class Template extends Resource {
-    private template?: HandlebarsTemplateDelegate;
+export class Template<T = any> extends Resource {
+    private template?: Handlebars.TemplateDelegate<T>;
 
-    getTemplate(): HandlebarsTemplateDelegate {
+    getTemplate(): Handlebars.TemplateDelegate<T> {
         if (!this.template) {
             const raw = readFile(this.fileName);
             this.template = Handlebars.compile(raw, {