models/version: Add features/featureList properties

[Turbo87]

Each published version can have different optional features and it would be nice to see when a feature has been introduced. This PR prepares for showing this information in the versions list by adding features and featureList properties to the version model.

[locks]

@bors r+

[bors]

📌 Commit 78c16aa has been approved by locks

[bors]

🔒 Merge conflict

This pull request and the master branch diverged in a way that cannot be automatically merged. Please rebase on top of the latest master branch, and let the reviewer approve again.

How do I rebase?

Assuming self is your fork and upstream is this repository, you can resolve the conflict following these steps:

1. git checkout features-list (switch to your branch)
2. git fetch upstream master (retrieve the latest master)
3. git rebase upstream/master -p (rebase on top of it)
4. Follow the on-screen instruction to resolve conflicts (check git status if you got lost).
5. git push self features-list --force-with-lease (update this PR)

You may also read Git Rebasing to Resolve Conflicts by Drew Blessing for a short tutorial.

Please avoid the "Resolve conflicts" button on GitHub. It uses git merge instead of git rebase which makes the PR commit history more difficult to read.

Sometimes step 4 will complete without asking for resolution. This is usually due to difference between how Cargo.lock conflict is handled during merge and rebase. This is normal, and you should still perform step 5 to update this PR.

Error message

CONFLICT (add/add): Merge conflict in tests/models/version-test.js
Auto-merging tests/models/version-test.js
Auto-merging app/models/version.js
Automatic merge failed; fix conflicts and then commit the result.

[bors]

☔ The latest upstream changes (presumably #3252) made this pull request unmergeable. Please resolve the merge conflicts.

[Turbo87]

@bors r=locks

[bors]

📌 Commit a2592b8 has been approved by locks

[bors]

⌛ Testing commit a2592b8 with merge 7e428dc...

[bors]

☀️ Test successful - checks-actions
Approved by: locks
Pushing 7e428dc to master...