chunks/excludeChunks can match compilation.chunkNames

[jeffposnick]

R: @developit @philipwalton @housseindjirdeh

Fixes #2717

workbox-webpack-plugin provides a way of allow/denylisting the assets in its precache manifest based on chunk names.

When making changes to the webpack plugin for the last major release, we started looking at the compilation.namedChunkGroups property to check for matches in chunks/excludeChunks. This neglects the fact that developers might also expect the names they provide to match against compilation.namedChunks (i.e. the actual chunk names, not the group names).

The code in this PR will still give preference to a match in compilation.namedChunkGroups (so it should be backwards-compatible), but for situations in which there's no match, it will fall back to checking compilation.namedChunks.

[developit]

Full disclosure: I have barely used Webpack 5 yet.

This approach seems reasonable to me. It's easier to understand than having exclude/include match both chunks and groups even when there are collisions.

[jeffposnick]

Thanks for taking the time to look at this, @developit!