Update eslint-plugin-prettier to the latest version 🚀

[greenkeeper[bot]]

The devDependency eslint-plugin-prettier was updated from 2.7.0 to 3.0.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Your Greenkeeper bot :palm_tree:

[codecov[bot]]

Codecov Report

Merging #99 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #99   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          15     15           
  Lines         383    383           
=====================================
  Hits          383    383

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