Workbench: upgrade electron and puppeteer dependencies

[emilyanndavis]

Since Electron releases a new major version every 8 weeks (in sync with every even-numbered major release of Chromium), the Workbench's electron dependency is now several major versions out of date. (Only the 3 most recent stable versions are officially supported, which means a release typically reaches EOL after 24 weeks, or 5–6 months.)

The puppeteer-core dependency is also a few major versions out of date.

Since both electron and puppeteer-core have Chromium dependencies that should be kept in sync, it makes sense to upgrade both packages in tandem to make sure they are compatible.

When I tried upgrading puppeteer-core (and electron, to a compatible version), the Workbench puppeteer test hangs (and eventually times out). There must be a breaking change introduced in puppeteer v22 (and possibly additional breaking changes in later versions), but I haven't been able to track it down yet.

Some references that may be useful:

• Electron Breaking Changes, with a section for each major release
• Puppeteer Changelog, with breaking changes listed under each major release