Added VS Code Marketplace Keywords

[ObliviousHarmony]

All Submissions:

• [x] Have you checked for duplicate PRs?
• [ ] Have you added an entry to the CHANGELOG.md file's [Unreleased] section?

Changes proposed in this Pull Request:

This pull request adds "keywords" so that we can get better discoverability on the marketplace. I've also gone ahead and updated our dependencies.

How to test the changes in this Pull Request:

N/A