🐛 Fixes an issue with running tests on windows

Author: skellock

src/main-window/load-url.test.ts

@@ -9,5 +9,9 @@ test("loads from storybook", () => {
 test("loads from electron", () => {
   const loadStub = jest.fn()
   loadURL({ loadURL: loadStub } as any, "a", false)
-  expect(loadStub).toBeCalledWith("file:///a/out/index.html")
+  if (process.platform === "win32") {
+    expect(loadStub).toBeCalledWith("file:///a\\out\\index.html")
+  } else {
+    expect(loadStub).toBeCalledWith("file:///a/out/index.html")
+  }
 })