chore: Bump version to 0.3.20-16

[tomi]

Description of change

Bump version prior to new version release.

To release #43 and #42

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply prettier formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits follow conventions explained in CONTRIBUTING.md

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Summary by cubic

Bump package version to 0.3.20-16 to prepare the next release. No functional changes; updates package.json only.

^{Written for commit b69ae92. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

[mfsiega]

👍