2.1.1: Fixed unable to retrieve PMC IDs

[AlexJSully]

Optimization:

• Added Jest unit testing

Documentation:

• Removed unnecessary Deepsource and Codeclimate badges

Update:

• Sentry now tracks console errors
• Update packages, including Prettier & ESLint
• Updated GitHub Actions to use Node 20

Bug fix:

• Fixed getting PMC IDs would always return 0 ID strings for each species

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This discussion was created from the release 2.1.1: Fixed unable to retrieve PMC IDs.