chore(deps): update dependency eslint to ^7.21.0

Author: renovate-bot

package-lock.json

@@ -58,7 +58,7 @@
     "deepmerge": "^4.2.2",
     "del": "^6.0.0",
     "del-cli": "^3.0.1",
-    "eslint": "^7.20.0",
+    "eslint": "^7.21.0",
     "eslint-config-prettier": "^8.1.0",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-prettier": "^3.3.1",