Resolve outdated dependencies

[brodycj]

npm outdated shows the following outdated dependencies:

Package                  Current   Wanted  Latest  Location
babel-loader               7.1.5    7.1.5   8.0.0  @syr/core
coveralls                 2.13.3   2.13.3   3.0.2  @syr/core
file-loader               1.1.11   1.1.11   2.0.0  @syr/core
html-webpack-plugin       2.30.1   2.30.1   3.2.0  @syr/core
jsdom                    11.12.0  11.12.0  12.0.0  @syr/core
mocha                      3.5.3    3.5.3   5.2.0  @syr/core
nyc                       11.9.0   11.9.0  13.0.1  @syr/core
styled-jsx                1.0.11   1.0.11   3.0.2  @syr/core
uglifyjs-webpack-plugin    0.4.6    0.4.6   1.3.0  @syr/core
webpack                   3.12.0   3.12.0  4.17.1  @syr/core
webpack-dev-server        2.11.3   2.11.3   3.1.7  @syr/core

I have already dealt with a couple as follows:

• mocha: update proposed in Use mocha@5 (latest) #257 (tested)
• styled-jsx: removed as proposed in Remove css-js, styled-jsx & travis-cov dev deps #259

I hope we can update the other dependencies within the near future. I can take a closer look in the next month or so.

[dmikey]

Most of these seem related to webpack, we'll be held back from upgrading until we can get time to write a proper chunking plugin for 4.0 which no longer allows you to chunk based on module location - and kind nukes our small chunks strategy.

[brodycj]

Thanks @dmikey