Which version is 'stable' release?

I'm actually confused over what the 'latest' version even is.

There seem to be at least 3 links being used:

On this GIT it says:
https://raw.githubusercontent.com/eclipse/paho.mqtt.javascript/master/src/paho-mqtt.js

But also says official download is:
https://www.eclipse.org/downloads/download.php?file=/paho/releases/1.0.3/paho.javascript-1.0.3.zip

While on actual eclipse website for Paho it says to use this CDN:
https://cdnjs.cloudflare.com/ajax/libs/paho-mqtt/1.0.1/mqttws31.js

All three of these are different.

Which is recommended one? Thanks!