merge package template from arlac77/npm-package-template

[arlac77]

package.json

• chore(devDependencies): update rollup@^0.55.4 from template

[coveralls]

Coverage remained the same at 71.812% when pulling b20fffd on template-sync-1 into 4da8779 on master.

[codecov-io]

Codecov Report

Merging #90 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #90   +/-   ##
=======================================
  Coverage   73.68%   73.68%           
=======================================
  Files           3        3           
  Lines         133      133           
=======================================
  Hits           98       98           
  Misses         35       35

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