Updated dependencies and moved webpack-sources to dependencies

[webdeveric]

Closes #35

[codecov-io]

Codecov Report

Merging #36 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #36   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines         236    236           
  Branches       50     50           
=====================================
  Hits          236    236

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