Fix tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/main/index.ts

@@ -15,7 +15,7 @@ const di = getDi();
 
 const startApplication = di.inject(startMainApplicationInjectable);
 
-startApplication();
+void startApplication();
 
 /**
  * Exports for virtual package "@k8slens/extensions" for main-process.

src/main/start-main-application/start-main-application.injectable.ts

@@ -43,7 +43,7 @@ const startMainApplicationInjectable = getInjectable({
       // https://github.com/electron/electron/issues/21370
       beforeElectronIsReady();
 
-      (async () => {
+      return (async () => {
         await waitForElectronToBeReady();
 
         await beforeApplicationIsLoading();