editorconfig: add NEWS whitespace configuration

.editorconfig

@@ -14,6 +14,10 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 charset = utf-8
 
+[NEWS]
+indent_style = space
+indent_size = 4
+
 # Match config files, set indent to spaces with width of eight
 [*.{c,h}]
 indent_style = space