Release 4.0.0

Added

• Github actions for running tests, via test-ci npm script
• xo linter, with .prettierrc.yaml config
• nodejs v13 support in .travis.yml
• npm-run-all for running npm scripts in parallel

Updated

• Refactoring and updating to es6 features
• grunt@1.1.0
• request@2.88.2
• snyk@1.299.0
• tv4-reporter@4.0.2

Removed

• eslint
• nodejs <10 support