* remove bluebird from devDependencies (Miroslav Bajtoš)
 * update eslint + config to latest (Miroslav Bajtoš)
 * update mocha to 8.x (Miroslav Bajtoš)
 * chore: update dependencies to latest (Miroslav Bajtoš)
 * [SEMVER-MAJOR] Drop support for Node.js 8.x (Miroslav Bajtoš)
 * chore: switch to DCO (Diana Lau)
 * docs: update default value setup section (Agnes Lin)
 * chore: add Node.js 14 to travis (Diana Lau)
 * chore: update CODEOWNERS (Diana Lau)
 * fixed typo on readme (filipef101)