chore(deps): update dependency rollup to v2.26.7

Author: renovate-bot

package-lock.json

@@ -55,7 +55,7 @@
     "prettier": "2.1.1",
     "prettier-config-standard": "1.0.1",
     "rimraf": "3.0.2",
-    "rollup": "2.26.6",
+    "rollup": "2.26.7",
     "should": "13.2.3",
     "vinyl": "2.2.0"
   },