Bump rollup from 1.32.1 to 2.0.2

Bumps [rollup](https://github.com/rollup/rollup) from 1.32.1 to 2.0.2.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v1.32.1...v2.0.2)

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

Author: dependabot-preview[bot]

package.json

@@ -44,7 +44,7 @@
     "nodemon": "^2.0.0",
     "npm-run-all": "^4.1.2",
     "popper.js": "^1.12.9",
-    "rollup": "^1.25.1",
+    "rollup": "^2.0.2",
     "rollup-plugin-babel": "^4.2.0",
     "rollup-plugin-replace": "^2.0.0",
     "uglify-js": "^3.5.15"