[Snyk] Security upgrade webpack-dev-server from 1.16.5 to 2.2.0

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `npm` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • package.json

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Breaking Change	Exploit Maturity
	704/1000 Why? Has a fix available, CVSS 9.8	Arbitrary Code Injection SNYK-JS-OPEN-174041	Yes	No Known Exploit

(*) Note that the real score may have changed since the PR was raised.

Commit messages

Package name: webpack-dev-server

The new version differs by 220 commits.

• 7e18f6a 2.2.0
• e9dd0ed Upgrade webpack dependency
• cae704f Update README to new standard
• d560695 Fix broken test after webpack update
• 84a98ad update webpack dev dependency
• a947336 Refactor to ES6
• fb74672 Bring eslint config in line with webpack/webpack
• 2f9ac82 Make Travis run Node.js v4 and v6
• bbcca86 Require Node.js v4.7 or higher
• fcf5f3c (fix) proxy config with bypass and without target (#721)
• 00bdcd5 2.2.0-rc.0
• cffd387 update webpack-dev-middleware dep
• 1adb818 Allow webpack 2 rc
• 658280d Update License to match with webpack/webpack
• 1f60309 2.1.0-beta.12
• 7eb7a92 Add warning for issues with Node.js v7
• 8a4b070 Fix colors in CLI not working when using stats as a string
• b072535 Simplify issue template
• 5efc245 Bring back reloading the app after compiler warnings
• 2a74a08 Fix tests after the schema change
• 4131be5 Disallow usage of `true` in `contentBase` option
• 10db4a7 Allow `none` as value for the `clientLogLevel` option
• a874303 2.1.0-beta.11
• 7cb0490 Fix `--open` flag opening wrong URL when using lazy mode

See the full diff

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