Update dependency rollup to v2.27.0

Author: renovate-bot

package-lock.json

@@ -44,7 +44,7 @@
     "mri": "1.1.6",
     "prettier": "2.1.1",
     "qss": "2.0.3",
-    "rollup": "2.26.9",
+    "rollup": "2.27.0",
     "rollup-plugin-css-only": "2.1.0",
     "rollup-plugin-terser": "7.0.1",
     "sirv-cli": "1.0.6",