Update webpack to the latest version 🚀

[greenkeeper]

Version 4.15.1 of webpack was just published.

Dependency	webpack
Current Version	4.15.0
Type	devDependency

The version 4.15.1 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 webpack.

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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Release Notes

v4.15.1

Bugfixes

• fix memory leaks when using HMR and in SplitChunksPlugin cache
• fix undefined automaticNameDelimiter in cache groups when using maxSize
• fix ProfilingPlugin for node.js 10 and 6

Commits

The new version differs by 10 commits.

• 81149be 4.15.1
• 6f53dbe Merge pull request #7655 from skratchdot/issue-7654
• 7fc88cd Merge pull request #7662 from webpack/bugfix/undefined-in-max-size
• 67d932d Merge pull request #7661 from webpack/bugfix/split-chunks-leak
• 5341d7d Merge pull request #7660 from webpack/bugfix/hot-leak
• 8e8f185 fixes usage of automaticNameDelimiter in cache groups
• 64b22c4 make the cache a WeakMap to not leak memory
• 6172d3c fix memory leak with HMR
• 3b6f475 Use push null to end the stream
• 6705141 prevent UnhandledPromiseRejectionWarning in node 6

See the full diff

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