chore(deps-dev): bump rollup from 1.26.3 to 1.26.4

Bumps [rollup](https://github.com/rollup/rollup) from 1.26.3 to 1.26.4.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/commits)

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

Author: dependabot-preview[bot]

package.json

@@ -80,7 +80,7 @@
     "markdownlint-cli": "0.19.0",
     "npm-run-all": "4.1.5",
     "prettier": "1.19.1",
-    "rollup": "1.26.3",
+    "rollup": "1.26.4",
     "rollup-plugin-commonjs": "10.1.0",
     "rollup-plugin-filesize": "6.2.1",
     "rollup-plugin-json": "4.0.0",