upgraded to antibody v2.3+

this version keeps the order of the bundles and still does its stuff in parallel, so we can get rid of the three calls to it

simple is better :)

antibody/bundles.txt

@@ -1,4 +1,4 @@
-# note this is alphabetically sorted
+# this block is in alphabetic order
 caarlos0/git-add-remote kind:path
 caarlos0/jvm
 caarlos0/ports kind:path
@@ -10,3 +10,8 @@ mafredri/zsh-async
 Tarrasch/zsh-bd
 wbinglee/zsh-wakatime
 zsh-users/zsh-completions
+
+# these should be at last!
+sindresorhus/pure
+zsh-users/zsh-syntax-highlighting
+zsh-users/zsh-history-substring-search

antibody/install.sh

@@ -1,10 +1,8 @@
 #!/bin/sh
 if which brew >/dev/null 2>&1; then
-  brew install getantibody/tap/antibody
+  brew install getantibody/tap/antibody || brew upgrade antibody
 else
   curl -sL https://git.io/antibody | sh -s
 fi
 
 antibody bundle < "$DOTFILES/antibody/bundles.txt" > ~/.bundles.txt
-antibody bundle sindresorhus/pure >> ~/.bundles.txt
-antibody bundle < "$DOTFILES/antibody/last_bundles.txt" >> ~/.bundles.txt