fix: duplicate backend library files

[giladgd]

Description of change

fix: duplicate backend library files - npm treats the SOVERSION file symlinks as separate files when publishing, so we better skip those to make the npm packages smaller

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply eslint 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
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