Changelog is out of date

[dcmiddle]

As part of CII badging we do claim to have a changelog
https://bestpractices.coreinfrastructure.org/projects/2447
https:/hyperledger/ursa/blob/master/CHANGELOG
but it seems we've been forgetting to update it.
At the moment we are on version 0.3.5 on crates.io but the changelog only documents our initial 0.1.0 release.

[appetrosyan]

I'd like to add automatic changelog generation

[brentzundel]

Based on conversation during 26 Oct 2022 meeting, best solution would be setting up automatic generation of the changelog.