Switch to prepending ourself to $PATH

Author: unixorn

git-open.plugin.zsh

@@ -3,4 +3,4 @@
 # Make git-open easy to install and keep up to date if you're using a
 # ZSH framework like Zgen or Antigen
 
-  export PATH=${PATH}:$(dirname $0)
+  export PATH=$(dirname $0):${PATH}