Increase timeout for skeleton wizard tests

We've now added more tests and pushed the total duration over 5 seconds
for all the tests in this file.

In general it seems like for components that are heavily tested, we're
increasing the default timeout.

At the moment this makes it seem like you're doing something wrong if a
file with tests takes more than 5 seconds, when in actual fact the limit
seems arbitrary.

I wonder if we could reverse this and set timeouts of 5 seconds only
where they're needed.

Author: elenatanasoiu

extensions/ql-vscode/test/vscode-tests/cli-integration/skeleton-query-wizard.test.ts

@@ -13,6 +13,10 @@ import { testCredentialsWithStub } from "../../factories/authentication";
 import { DatabaseItem, DatabaseManager } from "../../../src/local-databases";
 import * as databaseFetcher from "../../../src/databaseFetcher";
 
+// The tests in this file take longer than the default 5 seconds to run,
+// so we're increasing the timeout.
+jest.setTimeout(20_000);
+
 describe("SkeletonQueryWizard", () => {
   let wizard: SkeletonQueryWizard;
   let dir: tmp.DirResult;