v2.0.0

• Only run yarn run build on yarn run package.
• Test and example debugging support and documentation.
• Update CircleCI build.
  • Run CircleCI tests on base images and alpine images.
  • Separate test and publish jobs on CircleCI.
  • Move .circle.yml to .circleci/config.yml.
  • Add .circleci/envvars.sh for updating CircleCI environment variables.
  • Move CircleCI publish script to .circleci/publish.sh.
• Documentation updates.
  • Improve README instructions.
  • Expand testing section.
  • Move example section to examples/README.md.
• Add sample integration test and fixtures.
  • Add test, and fixtures paths.
  • Add util.promizify.
• Example updates.
  • Debugging support.
  • Display examples with yarn run example.
  • Put example options in envVars constant.
  • Use log in example.
  • Lint examples.
• Support data path in linter.
• Add .npmrc and tmp to .gitignore.