Upon login getting warning that my version 2.1.10 is out of date, and that the latest version is 2.1.8.

Thanks for the report - it's really one of those stupid mistakes that only shows up on special occasions, this time with the patch version reaching 10.

Also, I'm already using SemVer - it's just the comparison between clients that fails as it's currently formatted as a string.

Cool 👍

I saw the versioning of the addon following the SemVer standard, but my point was mainly for SemVer library to be used whenever dealing with version logic in the code to avoid the need of parsing those string versions etc.

Same for everyone i think
just see core.lua ln:675

there is just a simple string compare ;)

8 ist just bigger then 1

Yepp, saw that :) I personally would suggest SemVer implementation to be included as this will cover most use-cases and not need to do additional stuff for parsing and comparing.

Something like https://github.com/kikito/semver.lua

I see - it's however a bit overkill for what's needed in this project :)