chore: bump flowgen from 1.15.0 to 1.16.0 in /web3.js (#21435)

Bumps [flowgen](https://github.com/joarwilk/flowgen) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/joarwilk/flowgen/releases)
- [Commits](https://github.com/joarwilk/flowgen/commits)

---
updated-dependencies:
- dependency-name: flowgen
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

web3.js/package-lock.json

@@ -7883,9 +7883,9 @@
       }
     },
     "node_modules/flowgen": {
-      "version": "1.15.0",
-      "resolved": "https://registry.npmjs.org/flowgen/-/flowgen-1.15.0.tgz",
-      "integrity": "sha512-ym/kL2RGolCHArTAPRTPJa95CC0ZDWSh69KTCLIunc6wsXMT5MGpRFT/UhOVv205a2JHekm5booya1XHOqEi9Q==",
+      "version": "1.16.0",
+      "resolved": "https://registry.npmjs.org/flowgen/-/flowgen-1.16.0.tgz",
+      "integrity": "sha512-tnaPgFK2tuUG2EEJLycJlOWfnbB0Z7RiqWNl+rRWCxNBoeJTS7t78XCZY7YZdQjBxC77ZeHzfQ+AgIveXXLUJA==",
       "dev": true,
       "dependencies": {
         "@babel/code-frame": "^7.10.4",
@@ -23955,9 +23955,9 @@
       "dev": true
     },
     "flowgen": {
-      "version": "1.15.0",
-      "resolved": "https://registry.npmjs.org/flowgen/-/flowgen-1.15.0.tgz",
-      "integrity": "sha512-ym/kL2RGolCHArTAPRTPJa95CC0ZDWSh69KTCLIunc6wsXMT5MGpRFT/UhOVv205a2JHekm5booya1XHOqEi9Q==",
+      "version": "1.16.0",
+      "resolved": "https://registry.npmjs.org/flowgen/-/flowgen-1.16.0.tgz",
+      "integrity": "sha512-tnaPgFK2tuUG2EEJLycJlOWfnbB0Z7RiqWNl+rRWCxNBoeJTS7t78XCZY7YZdQjBxC77ZeHzfQ+AgIveXXLUJA==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.10.4",