message: Fix CI on windows.
  On windows, batch files are only recognized if you try to execute them
  via shell, so trampoline scripts like `npx` or `mocha-webdriver-runner`
  are not found we attempt to run them directly by system call.
diff: @@ -69,7 +69,7 @@ server.listen(port, () => {
  const cmdArgs = command;
  console.error(`with-http-server: Running ${cmdFile} ${cmdArgs.join(" ")}`);
  const child = child_process.spawn(cmdFile!, cmdArgs, {
  - shell: false,
  + shell: true,
  stdio: "inherit"
  });
  