Summary

• Fix the README NPM installation command so it uses npm instead of repeating the Yarn command.

Fix/Approach

• Updated the #### NPM installation snippet from yarn add nest-web3 to npm install nest-web3.
• Kept the package name as nest-web3, matching package.json and the README imports.

Verification

• python3 - <<'PY' ... before the change: failed as expected because the NPM section used yarn add nest-web3.
• python3 - <<'PY' ...: passed; verified the NPM section starts with npm, includes the package name from package.json, and no longer uses yarn add.
• npm pkg get name: returned "nest-web3".
• npm test --if-present: passed; no test script is defined.
• git diff --check: passed.

Related issue

Fixes #4