Update unsupported APIs filter for JS converter

[JoshMock]

Most of the APIs that were unsupported before should work now.

Also noticed the README was missing a JS section. 🚀

[miguelgrinberg]

LGTM! Good prompt for me to review the Python list, which might also be out of date.

[github-actions]

The backport to 9.0 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-9.0 9.0
# Navigate to the new working tree
cd .worktrees/backport-9.0
# Create a new branch
git switch --create backport-90-to-9.0
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 edb8f47a06330fa1ab4a6cbcca93fd7198fec344
# Push it to GitHub
git push --set-upstream origin backport-90-to-9.0
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-9.0

Then, create a pull request where the base branch is 9.0 and the compare/head branch is backport-90-to-9.0.