Release 0.12.0

• Modify colors support (e2cabc6)
• Remove dead code (d35bc15)
• Merge pull request #1 from autoserver-org/feature/coverage (ce9e004)
• Improve npm run ci-test (96f969e)
• Revert "Add test" (637fa2e)
• Add test (a8d9f3e)
• Upgrade sinon 7.0.0 -> 7.1.0 (c610351)
• Upgrade eslint-config-standard-prettier-fp 1.6.1 -> 1.7.0 (08568ad)
• Upgrade eslint-plugin-markdown 1.0.0-beta.8 -> 1.0.0-rc.0 (cf18089)
• Upgrade eslint-plugin-node 7.0.1 -> 8.0.0 (dec0734)
• Fix markdown linting (92bc851)
• Upgrade eslint-config-standard-prettier-fp 1.4.0 -> 1.5.1 (6b331d7)
• Update Gitter badge (e2ebb06)
• Add coveralls (ca4cb8b)
• Add nyc (470c322)