build(deps-dev): bump rollup from 1.12.3 to 1.13.1

Bumps [rollup](https://github.com/rollup/rollup) from 1.12.3 to 1.13.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v1.12.3...v1.13.1)

package.json

@@ -107,7 +107,7 @@
     "retext-spell": "^2.4.0",
     "retext-syntax-urls": "^1.0.1",
     "retext-usage": "^0.5.0",
-    "rollup": "1.12.3",
+    "rollup": "1.13.1",
     "rollup-plugin-commonjs": "10.0.0",
     "rollup-plugin-json": "4.0.0",
     "rollup-plugin-node-resolve": "5.0.0",