Update workbox-webpack-plugin to the latest version 🚀

[greenkeeper[bot]]

☝️ Greenkeeper’s updated Terms of Service will come into effect on April 6th, 2018.

Version 3.0.0 of workbox-webpack-plugin was just published.

Dependency	workbox-webpack-plugin
Current Version	2.1.3
Type	devDependency

The version 3.0.0 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of workbox-webpack-plugin.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Your Greenkeeper bot :palm_tree:

[greenkeeper[bot]]

Version 3.0.1 just got published.

Update to this version instead 🚀

[greenkeeper[bot]]

Version 3.1.0 just got published.

Update to this version instead 🚀

[greenkeeper[bot]]

Version 3.2.0 just got published.

Update to this version instead 🚀