Added test and note to CHANGELOG

Author: jakubsta

CHANGELOG.md

@@ -5,6 +5,7 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 
 ## [Unreleased]
 ### Fixed
+- [`prefer-default-export`] handles flow `export type` ([#484])
 - [`prefer-default-export`] handles re-exported default exports ([#609])
 - Fix crash when using `newline-after-import` with decorators ([#592])
 - Properly report `newline-after-import` when next line is a decorator

tests/src/rules/prefer-default-export.js

@@ -66,6 +66,11 @@ ruleTester.run('prefer-default-export', rule, {
         import * as foo from './foo';`,
       }),
 
+    test({
+      code: `export type UserId = number;`,
+      parser: 'babel-eslint',
+      }),
+
     // ...SYNTAX_CASES,
   ],
   invalid: [