chore(deps-dev): bump rollup from 1.13.0 to 1.15.2

Bumps [rollup](https://github.com/rollup/rollup) from 1.13.0 to 1.15.2.
- [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/v1.13.0...v1.15.2)

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

web3.js/package-lock.json

@@ -17735,20 +17735,20 @@
       }
     },
     "rollup": {
-      "version": "1.13.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.13.0.tgz",
-      "integrity": "sha512-pW4G4cQmtEmbg4/CoFYc2AYeKiGpMAVak7kFpch1UJnYkXMn/34L8cD0kxkmjJNpJ/NagOHVdCwdkbtCEuDEww==",
+      "version": "1.15.2",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.15.2.tgz",
+      "integrity": "sha512-NsH0Mjqk/RtlhSIJopNUiCYi3r3zudHxg9Cj6Or96QnJw/suab0/PjL50/GRNE5omvXEG2F9K4a334ddvA1Txg==",
       "dev": true,
       "requires": {
         "@types/estree": "0.0.39",
-        "@types/node": "^12.0.3",
+        "@types/node": "^12.0.8",
         "acorn": "^6.1.1"
       },
       "dependencies": {
         "@types/node": {
-          "version": "12.0.4",
-          "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.4.tgz",
-          "integrity": "sha512-j8YL2C0fXq7IONwl/Ud5Kt0PeXw22zGERt+HSSnwbKOJVsAGkEz3sFCYwaF9IOuoG1HOtE0vKCj6sXF7Q0+Vaw==",
+          "version": "12.0.8",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-12.0.8.tgz",
+          "integrity": "sha512-b8bbUOTwzIY3V5vDTY1fIJ+ePKDUBqt2hC2woVGotdQQhG/2Sh62HOKHrT7ab+VerXAcPyAiTEipPu/FsreUtg==",
           "dev": true
         },
         "acorn": {

web3.js/package.json

@@ -111,7 +111,7 @@
     "marked": "^0.6.0",
     "prettier": "^1.14.3",
     "rimraf": "2.6.3",
-    "rollup": "1.13.0",
+    "rollup": "1.15.2",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "9.3.4",
     "rollup-plugin-json": "^4.0.0",