Takes a list of async functions and executes them one at a time. You could just use a `for of` loop for this too 😅

serial.ts

/**
 * takes a list of async functions and executes them one at a time
 */
async function serial(
  fnList: Array<() => Promise<void>>,
  nextIndex?: number = 0,
) {
  let current = fnList[nextIndex];
  if (!current) return;

  try {
    await current();
  } catch (err) {
    console.error(err);
  }

  await serial(fnList, nextIndex + 1);
}