Update zshrc (#27)

This fixes the anomoly where running `exa` doesn't show the current and parent directory, but `ls` does. As far as I can tell, this was happening as the `ls` alias was calling `exa` recursively — `exa` was calling the `exa` alias, which calls the `exa` alias, etc.

zshrc

@@ -22,7 +22,7 @@ setopt globDots
 
 
 # Create Aliases
-alias ls='exa -laFh --git'
+alias ls='exa'
 alias exa='exa -laFh --git'
 alias trail='<<<${(F)path}'
 alias ftrail='<<<${(F)fpath}'