update packages

lisp/citeproc/citeproc-prange.el

@@ -25,6 +25,8 @@
 
 ;;; Code:
 
+(require 'citeproc-s)
+
 (defun citeproc-prange--end-significant (start end len)
   "Return the significant digits of the end in page range START END.
 START and END are strings of equal length containing integers. If