Fix issue with cask from alternative taps

This makes sure it correctly detects already installed casks like
logitech-options, which during installation needs to be specified as
"caskroom/drivers/logitech-options", but is then listed as
"logitech-options" on "cask list".

bin/bootstrap-caskroom

@@ -100,6 +100,10 @@ installed=( $(brew cask list) )
 
 for pkg in "${pkgs[@]}"; do
   base=$(echo $pkg | awk '{print $1}')
+  if [[ "$base" == *\/* ]]; then
+     base=$(basename "$base")
+  fi
+
   found=""
 
   for i in ${installed[@]}; do