add new page-range formats (#302)

* add new page-range formats

* change order of range formats

Co-authored-by: denismaier <[email protected]>

Author: 2 people

schemas/styles/csl.rnc

@@ -761,7 +761,7 @@ div {
 
     ## Reformat page ranges in the "page" variable.
     attribute page-range-format {
-      "chicago" | "expanded" | "minimal" | "minimal-two"
+      "expanded" | "minimal" | "minimal-two" | "minimal-oup" | "chicago" | "mhra" 
     }?
   citation.cite-group-delimiter =