docs: update setup instructions (#22)

README.md

@@ -13,32 +13,32 @@ npm i -D eslint-plugin-depend
 
 ## Usage
 
-Add to your `.eslintrc.json`:
-
-```json
-{
-  "extends": [
-    "plugin:depend/recommended"
-  ]
-}
-```
-
-Or if you're using (flat) config files, add to your `eslint.config.js`:
+If you're using the new flat config files, add to your `eslint.config.js`:
 
 ```ts
-import {configs} from 'eslint-plugin-depend';
+import * as depend from 'eslint-plugin-depend';
 
 export default [
-  configs['flat/recommended'],
+  depend.configs['flat/recommended'],
 
   // or if you want to specify `files`, or other options
   {
-    ...configs['flat/recommended'],
+    ...depend.configs['flat/recommended'],
     files: ['test/**/*.js']
   }
 ];
 ```
 
+For older legacy projects, add to your `.eslintrc.json`:
+
+```json
+{
+  "extends": [
+    "plugin:depend/recommended"
+  ]
+}
+```
+
 ### With `package.json`
 
 Some rules (e.g. `ban-dependencies`) can be used against your `package.json`.