chore(deps): update dependency eslint-plugin-unicorn to v21

Author: renovate-bot

package.json

@@ -90,7 +90,7 @@
     "eslint-plugin-node": "11.1.0",
     "eslint-plugin-prettier": "3.1.4",
     "eslint-plugin-promise": "4.2.1",
-    "eslint-plugin-unicorn": "20.1.0",
+    "eslint-plugin-unicorn": "21.0.0",
     "husky": "4.2.5",
     "prettier": "2.0.5",
     "release-it": "13.6.3",