Update dependency eslint to v8

Author: renovate-bot

package.json

@@ -20,7 +20,7 @@
     "chalk": "1.1.3",
     "cross-spawn": "4.0.0",
     "css-loader": "0.23.1",
-    "eslint": "3.1.1",
+    "eslint": "8.10.0",
     "eslint-loader": "3.0.3",
     "eslint-plugin-flowtype": "2.4.0",
     "eslint-plugin-import": "1.12.0",