message: doc(README): Use shields.io badge
diff: itk.js
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  -[![CircleCI](https://circleci.com/gh/InsightSoftwareConsortium/itk-js.svg?style=svg)](https://circleci.com/gh/InsightSoftwareConsortium/itk-js)
  +[![CircleCI](https://img.shields.io/circleci/project/github/InsightSoftwareConsortium/itk-js/master.svg)](https://circleci.com/gh/InsightSoftwareConsortium/itk-js)
  Provides general scientific image, mesh, and point set IO capability and bridges
  [ITK](https://itk.org) code running in an
  