Bump rollup from 0.64.1 to 2.79.2

Bumps [rollup](https://github.com/rollup/rollup) from 0.64.1 to 2.79.2.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v0.64.1...v2.79.2)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "@babel/plugin-proposal-decorators": "^7.4.0",
     "@babel/plugin-transform-runtime": "^7.0.0",
     "@babel/preset-env": "^7.4.2",
-    "rollup": "^0.64.1",
+    "rollup": "^2.79.2",
     "rollup-plugin-babel": "^4.3.2",
     "rollup-plugin-commonjs": "^9.1.8",
     "rollup-plugin-copy": "^0.2.3",