Workbox v4.0.0-rc.4

The latest RC release of Workbox v4 includes the following developer-visible changes, in addition to all the changes from the previous pre-releases.

🐛 What's Fixed?

workbox-precaching

• Fixed a bug where precached assets would not trigger the cacheDidUpdate callback because the now contain a __WB_REVISION__ URL parameter. [#1914]

workbox-routing

• Fixed a bug where the message listener add via addCacheListener would throw an error if a message event was received where the event.data property was not an object. [#1913]