Enable ESM modules in tests

[Jagoda11]

Summary

• install babel-jest and @babel/preset-env for transforming ESM packages
• add .babelrc configuring Node target
• update Jest config to use babel-jest and transform graphql-request
• remove legacy .package-lock.json from node_modules

Testing

• npm test
• npm run build

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https://chatgpt.com/codex/tasks/task_e_686418d594bc83238200518223dc4e74

[Jagoda11]

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[Jagoda11]

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Thanks for closing this pull request! 🙌 🎉 🚀

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