Bugfix
- Fixed node.js version range in
enginesproperty from~4 ~6 ~8to>=4 <9in order to be compliant with Heroku's new requirements
⚠️ This change will let node.js v5 and v7 appear as supported versions. Both will probably work fine when installing from source. There will be no pre-packaged distributables for those versions though, as they are not covered in the CI process. The rationale behind this decision is how node.js handles uneven versions in their LTS schedule as never going into long-term-support.