Update dependency eslint to v7.26.0

Author: renovate-bot

package.json

@@ -29,7 +29,7 @@
     "@actions/github": "3.0.0"
   },
   "devDependencies": {
-    "eslint": "7.9.0",
+    "eslint": "7.26.0",
     "@zeit/ncc": "0.22.3"
   }
 }