Export changed files grouped by change status (#23)

action.yml

@@ -17,10 +17,13 @@ inputs:
     required: false
   filters:
     description: 'Path to the configuration file or YAML string with filters definition'
-    required: true
+    required: false
+outputs:
+  files:
+    description: 'Changed files grouped by status - added, deleted or modified.'
 runs:
   using: 'node12'
   main: 'dist/index.js'
 branding:
   color: blue
-  icon: filter
+  icon: filter