Updated to latest babel

[bvkimball]

Updated to latest babel because newer react builds require babel-loader 8+

Can't use latest create-react-app with oc-template-react because there is a conflict with babel loader.

I didn't bump the version.

[codecov[bot]]

Codecov Report

Merging #605 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #605   +/-   ##
=======================================
  Coverage   96.04%   96.04%           
=======================================
  Files          19       19           
  Lines         253      253           
  Branches       31       31           
=======================================
  Hits          243      243           
  Misses         10       10

Impacted Files	Coverage Δ
...-utils/oc-webpack/lib/configurator/server/index.js	100% <ø> (ø)	:arrow_up:
...-utils/oc-webpack/lib/configurator/client/index.js	100% <ø> (ø)	:arrow_up:

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