chore: fix polyfill issues

[Aman035]

Fixes Issue

#978

Changes proposed

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• My change requires changes to the documentation.
• I have updated the documentation accordingly.
• This PR does not contain plagiarized content.
• The title of my pull request is a short description of the requested changes.

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Note to reviewers

Install the latest dependencies before testing this PR

[github-actions]

File: package.json

1. There is a missing closing brace '}' after the "config" property.

2. There is a missing comma ',' after the closing brace '}' of the "config" property.

3. The "devDependencies" property is not closed with a closing brace '}'.

File: packages/examples/sdk-frontend-react/project.json

1. There is a missing closing brace '}' after the "serve" target.

2. There are missing commas ',' after the value of the "defaultConfiguration" property in the "serve" target.

3. There are missing commas ',' after the values of the "buildTarget" and "hmr" properties in the "serve" target.

File: packages/examples/sdk-frontend-react/src/webpack.config.js

No issues found.

File: yarn.lock

No issues found.

Overall, the syntax errors and missing commas in the package.json and project.json files need to be corrected.