handled error for using strict and compat together

Signed-off-by: Seyed Mohammad Mahdi Hatami <hatamik7@gmail.com>

Author: smmhatami

lib/handlebars/runtime.js

@@ -116,7 +116,7 @@ export function template(templateSpec, env) {
   // Just add water
   let container = {
     strict: function (obj, name, loc) {
-      if (!obj || !(name in obj)) {
+      if (!obj || (typeof obj === 'object' && obj !== null && !(name in obj))) {
         throw new Exception('"' + name + '" not defined in ' + obj, {
           loc: loc,
         });