chore(deps-dev): bump rollup from 1.8.0 to 1.9.0

Bumps [rollup](https://github.com/rollup/rollup) from 1.8.0 to 1.9.0.
- [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/v1.8.0...v1.9.0)

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

web3.js/package-lock.json

@@ -17132,13 +17132,13 @@
       }
     },
     "rollup": {
-      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.8.0.tgz",
-      "integrity": "sha512-dKxL6ihUZ9YrVySKf/LBz5joW2sqwWkiuki34279Ppr2cL+O6Za6Ujovk+rtTX0AFCIsH1rs6y8LYKdZZ/7C5A==",
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.9.0.tgz",
+      "integrity": "sha512-cNZx9MLpKFMSaObdVFeu8nXw8gfw6yjuxWjt5mRCJcBZrAJ0NHAYwemKjayvYvhLaNNkf3+kS2DKRKS5J6NRVg==",
       "dev": true,
       "requires": {
         "@types/estree": "0.0.39",
-        "@types/node": "^11.11.6",
+        "@types/node": "^11.13.0",
         "acorn": "^6.1.1"
       },
       "dependencies": {

web3.js/package.json

@@ -111,7 +111,7 @@
     "marked": "^0.6.0",
     "prettier": "^1.14.3",
     "rimraf": "2.6.3",
-    "rollup": "1.8.0",
+    "rollup": "1.9.0",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "9.3.4",
     "rollup-plugin-json": "^4.0.0",