find variant with lowest price

[gibkigonzo]

Short Description and Why It's Useful

This is extended find variant method. It returns variant that also has the lowest price. Now when we want to sort products on category page we can see variants that not necessary have the lowest price which may look like sorting doesn't work.

Which Environment This Relates To

Check your case. In case of any doubts please read about Release Cycle

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing Vue Storefront sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules

[pkarw]

This is pretty cool! it should be potentially moved to the API layer to optimize the frontend as a part of #3952

[pkarw]

... but I'd merge it anyway as #3952 is just a proposition and the overall impact is unknown

[andrzejewsky]

@gibkigonzo is it finished? Can you update the changelog?

[gibkigonzo]

Yes, it's finished and I've updated changelog (sorry 😅 )