Update readme, version header

Author: alphapapa

README.org

@@ -398,6 +398,11 @@ Expands into a call to ~org-ql-select~ with the same arguments.  For convenience
 
 /Note:/ Breaking changes may be made before version 1.0, but in the event of major changes, attempts at backward compatibility will be made with obsolescence declarations, translation of arguments, etc.  Users who need stability guarantees before 1.0 may choose to use tagged stable releases.
 
+** 0.4.8
+
+*Fixed*
++  Multiple sorters not preserved when refreshing views.  (Fixes [[https://github.com/alphapapa/org-ql/issues/136][#136]], [[https://github.com/alphapapa/org-ql/pull/137][#137]].  Thanks to [[https://github.com/natrys][Imran Khan]].)
+
 ** 0.4.7
 
 *Fixed*

org-ql.el

@@ -2,7 +2,7 @@
 
 ;; Author: Adam Porter <adam@alphapapa.net>
 ;; Url: https://github.com/alphapapa/org-ql
-;; Version: 0.4.6
+;; Version: 0.4.8
 ;; Package-Requires: ((emacs "26.1") (dash "2.13") (dash-functional "1.2.0") (f "0.17.2") (org "9.0") (org-super-agenda "1.2-pre") (ov "1.0.6") (peg "0.6") (s "1.12.0") (ts "0.2-pre"))
 ;; Keywords: hypermedia, outlines, Org, agenda