chore(deps-dev): bump rollup from 1.7.2 to 1.7.3

Bumps [rollup](https://github.com/rollup/rollup) from 1.7.2 to 1.7.3.
- [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/v1.7.2...v1.7.3)

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

web3.js/package-lock.json

@@ -16560,9 +16560,9 @@
       }
     },
     "rollup": {
-      "version": "1.7.2",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.7.2.tgz",
-      "integrity": "sha512-HdbjbHsvoLDwJU/lWEyktVlLdXR7mtnNxRnzaDb+fiNiboAxDYCpwLz1zLGI3+k890PacAptSGrqJLJnABMKJg==",
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-1.7.3.tgz",
+      "integrity": "sha512-U3/HaZujvGofNZQldfIknKoaNFNRS+j8/uCS/jSy3FrxF9t0FBsgZW4+VXLHG7l1daTgE6+jEy0Dv7cVCB2NPg==",
       "dev": true,
       "requires": {
         "@types/estree": "0.0.39",

web3.js/package.json

@@ -111,7 +111,7 @@
     "marked": "^0.6.0",
     "prettier": "^1.14.3",
     "rimraf": "2.6.3",
-    "rollup": "1.7.2",
+    "rollup": "1.7.3",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "9.2.1",
     "rollup-plugin-json": "^3.0.0",