Update debugging with webstorm recipe (#1483)

Update debugging with Webstorm recipe to include Node options flag --inspect-brk.

docs/recipes/debugging-with-webstorm.md

@@ -13,6 +13,8 @@ In the `JavaScript file` field specify the path to AVA in the project's `node_mo
 
 In the `Application parameters` pass the CLI flags you're using and the test files you would like to debug, for example `--verbose test.js`.
 
+In the `Node parameters`, for Node.js 7+, pass the `--inspect-brk` flag to enable the Node inspector. For earlier versions use `--debug-brk`.
+
 Save the configuration.
 
 ## Setup using npm
@@ -42,7 +44,9 @@ Use the following configuration parameters:
 
 Your IDE will then execute `npm run test` and thus call `node_modules/.bin/ava` and the AVA-configuration you have specified in your package.json.
 
-Don't forget to select a Node.js interpreter.
+In the `Node parameters`, for Node.js 7+ pass `--inspect-brk` or `--debug-brk` for earlier versions.
+
+Don't forget to select a Node.js interpreter. 
 
 Save the configuration.