Fix editor config for integration test files

Signed-off-by: Joas Schilling <coding@schilljs.com>

.editorconfig

@@ -10,6 +10,10 @@ indent_style = tab
 insert_final_newline = true
 trim_trailing_whitespace = true
 
+[*.feature]
+indent_size = 2
+indent_style = space
+
 [*.md]
 trim_trailing_whitespace = false