7.3.0. Ignores prefix on setCacheNameDetails

[rubenaguadoc]

Library Affected:
workbox-core, workbox-precaching

Browser & Platform:
All browsers

Issue or Feature Request Description:
Calling precacheAndRoute (from workbox-precaching) after calling setCacheNameDetails({ prefix: 'example' }); (from workbox-core), results in workbox ignoring the prefix and creating the workbox-precache-v2.... cache instead of example-precache-v2....

cacheNames.precache (from workbox-core) returns the correct precache name example-precache-v2... (wich does not exist, in this context)

This beahaviour was not present in 7.1.0

Example

import {
  setCacheNameDetails,
  skipWaiting,
  clientsClaim,
  cacheNames,
} from 'workbox-core';
import { precacheAndRoute } from 'workbox-precaching';

self.__WB_DISABLE_DEV_LOGS = true;

setCacheNameDetails({ prefix: 'my-app' });
skipWaiting();
clientsClaim();

precacheAndRoute([].concat(self.__WB_MANIFEST || []));
// Creates 'workbox-precache-v2...'

self.addEventListener('activate', (event) => {
    console.log(cacheNames.precache);
    // Yields 'my-app-precache-v2...'
});