Bump rollup from 1.32.1 to 2.79.2

Bumps [rollup](https://github.com/rollup/rollup) from 1.32.1 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@v1.32.1...v2.79.2)

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

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

Author: dependabot[bot]

package-lock.json

@@ -55,7 +55,7 @@
     "downlevel-dts": "^0.7.0",
     "mocha": "^6.2.2",
     "np": "^7.4.0",
-    "rollup": "^1.26.0",
+    "rollup": "^2.79.2",
     "rollup-plugin-filesize": "^6.2.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-terser": "^5.3.1",