v1.1.1

• Update dependencies:
  • Update to ansi-escapes@4.2.0
  • Update to chalk@2.4.2
  • Update to log-symbols@3.0.0
  • Update to plur@3.1.1
  • Update to string-width@4.1.0
  • Update to ava@2.2.0
  • Update to coveralls@3.0.5
  • Update to nyc@14.1.1
  • Update to strip-ansi@5.2.0
  • Update to xo@0.24.0
• Set minimum node version to >=8.
• Add Greenkeeper support.
• Add tests to CI pipelines.
• Add CODE_OF_CONDUCT.md.
• Add GitHub issue templates for bug reports and feature requests.