fix types for GlobalModel / GlobalCommandRunner so references work

src/models/commandrunner.ts

@@ -8,7 +8,7 @@ import { GlobalModel } from "./global";
 class CommandRunner {
     private constructor() {}
 
-    static getInstance() {
+    static getInstance(): CommandRunner {
         if (!(window as any).GlobalCommandRunner) {
             (window as any).GlobalCommandRunner = new CommandRunner();
         }

src/models/global.ts

@@ -1,6 +1,6 @@
 import { Model } from "./model";
 import { CommandRunner } from "./commandrunner";
 
-const GlobalModel = Model.getInstance();
-const GlobalCommandRunner = CommandRunner.getInstance();
+const GlobalModel: Model = Model.getInstance();
+const GlobalCommandRunner: CommandRunner = CommandRunner.getInstance();
 export { GlobalModel, GlobalCommandRunner };

src/models/model.ts

@@ -241,7 +241,7 @@ class Model {
         setTimeout(() => this.getClientDataLoop(1), 10);
     }
 
-    static getInstance() {
+    static getInstance(): Model {
         if (!(window as any).GlobalModel) {
             (window as any).GlobalModel = new Model();
         }