We rely on yarn workspaces so we don't want people using npm in the repo by accident.
Also updated the required node version to 12+.
~~Not sure about the min yarn version – the latest one could be missing in various CI-like envs, so I might change it yet.~~
Downgraded yarn to ">= 1.21.1" (the oldest of "current" versions, tagged "legacy")
The implemented helpers, are helper which might be in Ember core in the future:
- and
- or
- not
- eq
- not-eq
- lt
- lte
- gt
- gte
They follow the implementation of ember-truth-helpers: https://github.com/jmurphyau/ember-truth-helpers
Note 1: Ember rfcs are still debating going with {{not-eq}} or {{neq}}, should be easy to support in the future whatever is finally chosen.
Note 2: this commit also moves it to its own addon, and removes the {{not}} test, to simplify further updates.
