build(travis): update minimum node v4.3.0...4.8.0

[brianhelba]

As described in npm/npm#18395 , npm 5.4 is incompatible with Node.js 4.3. Furthermore, per https://github.com/nodejs/Release , Node.js 4.3 is no longer supported, only the latest 4.x release (currently 4.8) is still in LTS.

This change will ensure that all file-loader tests will start passing again, while keeping support for the broadest possible range of Node.js versions.

[jsf-clabot]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #204 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #204   +/-   ##
=======================================
  Coverage   96.96%   96.96%           
=======================================
  Files           2        2           
  Lines          33       33           
  Branches       16       16           
=======================================
  Hits           32       32           
  Misses          1        1

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[brianhelba]

@d3viant0ne PTAL. This will fix tests for file-loader, which are currently broken in master.

After this is (hopefully) merged, can we get this update into #183 , and look into merging that too?

[michael-ciniawsky]

Just node: '4' ?

[brianhelba]

@michael-ciniawsky So, I think the path forward on this PR is to wait for webpack-contrib/webpack-defaults#82 to be merged, then pull downstream just the changes (updating Travis, ignoring the others) to this repo?

[michael-ciniawsky]

Yep, if webpack-contrib/webpack-defaults#82 lands, it's just update the webpack-defaults dependency and npm run webpack-defaults to update all affected files (travis.yml etc) and commit the changes

[brianhelba]

@michael-ciniawsky Got it, thanks.

[brianhelba]

Closing this, to wait for webpack-contrib/webpack-defaults#82 and an associated release of webpack-defaults. At that point, I'll open a new PR to upgrade webpack-defaults in this repo.