refactor: change a variable type

Author: vchimev

demo/AngularApp/app/main.ts

@@ -16,7 +16,7 @@ if (module["hot"]) {
 
     module["hot"].accept(["./app.module"], () => {
         // Currently the context is needed only for application style modules.
-        const moduleContext = "{}";
+        const moduleContext = {};
         global["__hmrRefresh"](moduleContext);
     });
 }

lazy-ngmodule-hot-loader.js

@@ -5,7 +5,7 @@ const HOT_SELF_ACCEPT = "module.hot.accept();";
 const HOT_DISPOSE = `
         module.hot.dispose(() => {
             // Currently the context is needed only for application style modules.
-            const moduleContext = "{}";
+            const moduleContext = {};
             global.__hmrRefresh(moduleContext);
         });`;
 const HMR_HANDLER = `