[elpa] externals/mct updated (a5d5483 -> f2426b4)

[ELPA Syncer]

elpasync pushed a change to branch externals/mct.

      from  a5d5483   Extend overlay to edge of window when appropriate
       new  40b710b   Add missing doc string to helper function
       new  f2426b4   Make mct work on Emacs 27


Summary of changes:
 mct.el | 74 +++++++++++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 55 insertions(+), 19 deletions(-)