refactor: change severity of 'no-duplicate-key' rule from error to warn (#939)

Author: Rel1cx

packages/plugins/eslint-plugin-react-x/README.md

@@ -44,7 +44,7 @@ export default [
       "react-x/no-default-props": "error",
       "react-x/no-direct-mutation-state": "error",
       "react-x/no-duplicate-jsx-props": "warn",
-      "react-x/no-duplicate-key": "error",
+      "react-x/no-duplicate-key": "warn",
       "react-x/no-forward-ref": "warn",
       "react-x/no-implicit-key": "warn",
       "react-x/no-missing-key": "error",

packages/plugins/eslint-plugin/src/configs/all.ts

@@ -31,7 +31,7 @@ export const rules = {
   "@eslint-react/no-default-props": "error",
   "@eslint-react/no-direct-mutation-state": "error",
   "@eslint-react/no-duplicate-jsx-props": "warn",
-  "@eslint-react/no-duplicate-key": "error",
+  "@eslint-react/no-duplicate-key": "warn",
   "@eslint-react/no-forward-ref": "warn",
   "@eslint-react/no-implicit-key": "warn",
   "@eslint-react/no-missing-component-display-name": "warn",

packages/plugins/eslint-plugin/src/configs/core.ts

@@ -23,7 +23,7 @@ export const rules = {
   "@eslint-react/no-default-props": "error",
   "@eslint-react/no-direct-mutation-state": "error",
   "@eslint-react/no-duplicate-jsx-props": "warn",
-  "@eslint-react/no-duplicate-key": "error",
+  "@eslint-react/no-duplicate-key": "warn",
   "@eslint-react/no-forward-ref": "warn",
   "@eslint-react/no-implicit-key": "warn",
   "@eslint-react/no-missing-key": "error",