Auto rehash completions on bin change

Note that this might have a large performance issue

.zshrc

@@ -37,6 +37,8 @@ CORRECT_IGNORE="_*"
 zhighlighters=(main brackets)
 stty -ixon #disable XON/XOFF, which breaks C-s
 setopt no_share_history
+# rehashes on bin change, might cause performance issues
+zstyle ':completion:*' rehash true
 
 #load fasd if it exists
 hash fasd 2>/dev/null && eval "$(fasd --init auto)"