Prepare 0.20.0 release
Prepare 0.20.0 release

wakermahmud/autocomplete-plus,emhagman/autocomplete-jedi,Lyleo/autocomplete-plus,brntbeer/autocomplete-plus,atom-archive/autocomplete,kevinsawicki/autocomplete-plus,emhagman/autocomplete-jedi,atom-community/autocomplete-plus,kevinsawicki/autocomplete-plus,lestat220255/autocomplete-plus,atom/autocomplete,atom/autocomplete-plus