Update to webpack 3

[lencioni]

Now that webpack 3 is out, I am bumping some versions in here
so folks can update. I don't know if any other changes are required
but I figured I'd get the ball rolling.

Please Read the CONTRIBUTING Guidelines
In particular the portion on Commit Message Formatting

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe: Updating dependencies

What is the current behavior? (You can also link to an open issue here)

Could not update to webpack 3

What is the new behavior?

Can update to webpack 3

Does this PR introduce a breaking change?

• Yes
• No

If this PR contains a breaking change, please describe the following...

• Impact:
• Migration path for existing applications:
• Github Issue(s) this is regarding:

N/A

Other information:
This may require additional changes, I'm not sure.

[codecov]

Codecov Report

Merging #471 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #471   +/-   ##
=======================================
  Coverage   79.44%   79.44%           
=======================================
  Files           6        6           
  Lines         180      180           
  Branches       47       47           
=======================================
  Hits          143      143           
  Misses         17       17           
  Partials       20       20

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[danez]

Thanks