chore(deps-dev): bump rollup from 2.1.0 to 2.2.0

Bumps [rollup](https://github.com/rollup/rollup) from 2.1.0 to 2.2.0.
- [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/v2.1.0...v2.2.0)

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

web3.js/package-lock.json

@@ -20248,9 +20248,9 @@
       }
     },
     "rollup": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.1.0.tgz",
-      "integrity": "sha512-gfE1455AEazVVTJoeQtcOq/U6GSxwoj4XPSWVsuWmgIxj7sBQNLDOSA82PbdMe+cP8ql8fR1jogPFe8Wg8g4SQ==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.2.0.tgz",
+      "integrity": "sha512-iAu/j9/WJ0i+zT0sAMuQnsEbmOKzdQ4Yxu5rbPs9aUCyqveI1Kw3H4Fi9NWfCOpb8luEySD2lDyFWL9CrLE8iw==",
       "dev": true,
       "requires": {
         "fsevents": "~2.1.2"

web3.js/package.json

@@ -120,7 +120,7 @@
     "marked": "^0.8.0",
     "prettier": "^2.0.0",
     "rimraf": "3.0.2",
-    "rollup": "2.1.0",
+    "rollup": "2.2.0",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^10.0.0",
     "rollup-plugin-copy": "^3.3.0",