merge package template from arlac77/npm-package-template

[arlac77]

.npmignore

• chore(npm): update .npmignore from template

[coveralls]

Coverage remained the same at 84.492% when pulling 5b3e928 on template-sync-1 into 3f1623b on master.

[codecov-io]

Codecov Report

Merging #10 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #10   +/-   ##
=======================================
  Coverage   87.34%   87.34%           
=======================================
  Files           2        2           
  Lines         158      158           
=======================================
  Hits          138      138           
  Misses         20       20

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