how to control version of slime in emacs (using melpa package installer)

Mark H. David mhd at
Tue Jan 23 23:57:31 UTC 2018

Hi, I installed SLIME with the package installer (melpa), and I have no idea how to control the version. I would like to run version 2.20, but I seem to have version 2.19. Does anyone know how I can change to version 2.20?  I cannot find any documentation about this. Can anyone point this out?

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