[elpa] externals/org updated (01877f4 -> 490eba3)

[ELPA Syncer]

elpasync pushed a change to branch externals/org.

      from  01877f4   org-compat: Fix org-directory-empty-p
       new  31c07bd   oc: rx compatibility with Emacs < 27.1
       new  26d1711   oc: Add missing `require'
       new  100641b   oc-biblatex: Refactor code to simplify byte-compilation
       new  7336237   oc-basic: Pacify byte-compilator
       new  490eba3   Remove spurious `provide'


Summary of changes:
 lisp/oc-basic.el    | 10 +++++++---
 lisp/oc-biblatex.el | 43 +++++++++++++++++++++++++------------------
 lisp/oc-csl.el      | 14 ++++++++------
 lisp/oc-natbib.el   |  1 -
 lisp/oc.el          | 23 +++++++++++++++--------
 5 files changed, 55 insertions(+), 36 deletions(-)