Fix: Require org-duration

This appears to be necessary on newer Org versions, but I don't know
exactly when.

README.org

@@ -526,6 +526,7 @@ Simple links may also be written manually in either sexp or non-sexp form, like:
 
 *Fixed*
 + Non-sexp query parsing with updated version 1.0.1 of the ~peg~ package.  (Fixes [[https://github.com/alphapapa/org-ql/issues/314][#314]], [[https://github.com/alphapapa/org-ql/issues/316][#316]].  Thanks to [[https://github.com/akirak][Akira Komamura]] and [[https://github.com/joonro][Joon Ro]] for reporting.)
++ Require library ~org-duration~ (apparently necessary in newer Org versions).
 
 ** 0.6.2
 

org-ql.el

@@ -35,6 +35,7 @@
 
 (require 'cl-lib)
 (require 'org)
+(require 'org-duration)
 (require 'org-element)
 (require 'org-habit)
 (require 'seq)

org-ql.info

@@ -990,6 +990,8 @@ File: README.info,  Node: 063-pre,  Next: 062,  Up: Changelog
      (https://github.com/alphapapa/org-ql/issues/316).  Thanks to Akira
      Komamura (https://github.com/akirak) and Joon Ro
      (https://github.com/joonro) for reporting.)
+   • Require library ‘org-duration’ (apparently necessary in newer Org
+     versions).
 
 
 File: README.info,  Node: 062,  Next: 061,  Prev: 063-pre,  Up: Changelog
@@ -1634,34 +1636,34 @@ Node: Links35679
 Node: Tips36366
 Node: Changelog36690
 Node: 063-pre37461
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-Node: Notes59757
-Node: Comparison with Org Agenda searches59919
-Node: org-sidebar60808
-Node: License61087
+Node: 06237993
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+Node: Comparison with Org Agenda searches60012
+Node: org-sidebar60901
+Node: License61180
 
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