Update webpack to version 1.12.3 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

webpack just published its new version 1.12.3, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of webpack – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

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The new version differs by 30 commits .

• f3d65ef 1.12.3
• 662c5ab Merge pull request #1337 from shivawu/fix-abs-path
• c94f4df beautify
• ac9d6f3 add more HMR test cases
• 358c457 added first HMR test case
• b339a7e Merge pull request #1561 from ftdebugger/master
• 670bf21 disabled tests that fail because of npm 3
• e92bed7 fixed #295
• cbd0ba2 Fix fail when undefined module is coming to footer generator
• f3170d9 Merge pull request #1526 from brenoc/master
• 6547827 Merge pull request #1510 from virajsanghvi/uglifyjs-reset
• 5acfacf replaced Class with constructor
• 7b22009 Update uglify-js to v2.5.0
• 85e0f87 fixed tests
• 2507222 added dll example with module

There are 30 commits in total. See the full diff.

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