chore(deps): update dependency eslint to v8 (#34)

Author: renovate[bot]

package.json

@@ -64,7 +64,7 @@
     "@typescript-eslint/parser": "^5.0.0",
     "@zeit/ncc": "^0.22.1",
     "chalk": "^4.0.0",
-    "eslint": "^6.8.0",
+    "eslint": "^8.0.0",
     "eslint-config-prettier": "^6.5.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-jest": "^26.0.0",