Update webpack-dev-server to the latest version 🚀

[greenkeeper]

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

Version 3.1.0 of webpack-dev-server was just published.

Dependency	webpack-dev-server
Current Version	2.11.1
Type	devDependency

The version 3.1.0 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 webpack-dev-server.

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

v3.1.0

Updates

• Fancy logging; webpack-log is now used for logging to the terminal (webpack-dev-middleware was already using this).
• The logLevel option is added for more fine-grained control over the logging.

Bugfixes

• MultiCompiler was broken with webpack 4.
• Fix deprecation warnings caused by webpack 4. Note that you will still see some deprecation warnings because webpack-dev-middleware has not been updated yet.

Commits

The new version differs by 29 commits.

• 94398c4 3.1.0
• d20757b Upgrade another timeout for slow CI
• f0534fc Use webpack-log for logging
• f76182c 3.0.1-beta.0
• c375aa6 Fix support for multi compiler in webpack 4
• 9921ecc Add basic example for multi-compiler
• c32cfa8 Use non-deprecated webpack 4 API's
• 31d94ab Make tests use more webpack 4 goodiness
• 9934724 Fix accidental skip of nearly all tests (whoops)
• 6e1d886 3.0.0
• eedf10f Try again at fixing CI by upping timeout (necessary for node v6)
• dfe137c Hopefully fix failing CI tests (the hacky way)
• 1e7acca Actually make the yargs version test do something
• cdd10fa Stop testing node v4 on travis ci
• 7378e3e Merge branch 'webpack-4'

There are 29 commits in total.

See the full diff

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Your Greenkeeper bot 🌴

[astorije]

This breaks Webpack v4 support. See #2117