chore: bump rollup from 2.27.1 to 2.28.1 in /web3.js (#12365)

Bumps [rollup](https://github.com/rollup/rollup) from 2.27.1 to 2.28.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.27.1...v2.28.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

web3.js/package-lock.json

@@ -20257,9 +20257,9 @@
       }
     },
     "rollup": {
-      "version": "2.27.1",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.27.1.tgz",
-      "integrity": "sha512-GiWHQvnmMgBktSpY/1+nrGpwPsTw4b9P28og2uedfeq4JZ16rzAmnQ5Pm/E0/BEmDNia1ZbY7+qu3nBgNa19Hg==",
+      "version": "2.28.1",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.28.1.tgz",
+      "integrity": "sha512-DOtVoqOZt3+FjPJWLU8hDIvBjUylc9s6IZvy76XklxzcLvAQLtVAG/bbhsMhcWnYxC0TKKcf1QQ/tg29zeID0Q==",
       "dev": true,
       "requires": {
         "fsevents": "~2.1.2"

web3.js/package.json

@@ -125,7 +125,7 @@
     "marked": "^1.1.0",
     "prettier": "^2.0.0",
     "rimraf": "3.0.2",
-    "rollup": "2.27.1",
+    "rollup": "2.28.1",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-copy": "^3.3.0",