Bump rollup from 0.67.4 to 2.80.0

Bumps [rollup](https://github.com/rollup/rollup) from 0.67.4 to 2.80.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/v2.80.0/CHANGELOG.md)
- [Commits](rollup/rollup@v0.67.4...v2.80.0)

---
updated-dependencies:
- dependency-name: rollup
  dependency-version: 2.80.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package.json

@@ -63,6 +63,6 @@
     "tslint": "~6.1.3",
     "typescript": "3.9.7",
     "awesome-typescript-loader": "^2.2.1",
-    "rollup": "0.67.4"
+    "rollup": "2.80.0"
   }
 }