I've published a new version of Arraymancer v0.7.0 - release announcement is there https://github.com/mratsim/Arraymancer/releases/tag/v0.7.0.
Changelog is pretty short since I didn't have much time to dedicate to Arraymancer or even Nim in the past 6 months.
I don't foresee having more time as well hence why I started laying the ground work for Flambeau (https://github.com/SciNim/flambeau) as without doing it full time it's impossible to catch up with the incredible speed of the machine learning ecosystem.
Anyway, Arraymancer now should support all Nim versions since 1.0 to devel. Kudos to Vindaar for handling so many docs, tutorials and PRs during my relative absence.
I've also realized that my very first Arraymancer release was on Jul 12, 2017 (announcement thread https://forum.nim-lang.org/t/3029#19034). I guess a retrospective of the past 4 years is due and I need to write a blog post on my very first dev project which basically taught me everything.