feat: update jest to v27, as well as misc dependencies

[noahnu]

Releasing as a pre-release.

Changes

• Use yarn workspaces rather than multiple yarn projects.
• Bundle source with esbuild so we can later rewrite using typescript.
• Migrate service to typescript
• Update various dependencies in client and service workspaces.
• Added pre-release support to the project.

Notable Changes (that may need to be reconsidered)

• Remove posix as it's not compatible with node 14. Will loop back to this to see what we can do about memory usage + chromium core dump concerns.
• Call jest directly instead of assuming the binary exists. We may need to change this back or spawn runTests as a child process for performance.

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Can't update puppeteer until alixaxel/chrome-aws-lambda#264 is merged.