Bump rollup from 1.15.0 to 2.79.2

Bumps [rollup](https://github.com/rollup/rollup) from 1.15.0 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@v1.15.0...v2.79.2)

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

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

package.json

@@ -45,7 +45,7 @@
     "eslint-plugin-standard": "4.0.0",
     "http-server": "^0.11.1",
     "prettier": "1.18.2",
-    "rollup": "1.15.0",
+    "rollup": "2.79.2",
     "rollup-plugin-babel": "4.3.3",
     "rollup-plugin-eslint": "7.0.0",
     "rollup-plugin-glslify": "^1.1.3",