update NEWS

hfrick · hfrick · commit 23a52d22d2e1 · 2021-06-01T14:57:31.000+01:00
diff --git a/NEWS.md b/NEWS.md
@@ -1,5 +1,7 @@
 # parsnip (development version)
 
+* The helper functions `convert_form_to_xy_fit()`, `convert_form_to_xy_new()`, `convert_xy_to_form_fit()`, and  `convert_xy_to_form_new()` for converting between formula and matrix interface are now exported for developer use (#508).
+
 # parsnip 0.1.6
 
 ## Model Specification Changes
