Update alias to include nvim switch

dotfiles/zsh/aliases.zsh

@@ -25,6 +25,11 @@ alias rm='rm -i'
 # Better ls - lists more information for each file
 alias ll='ls -lh'
 
+# I use Neovim
+if [ -x "$(command -v nvim)" ]; then
+  alias vim=nvim
+fi
+
 # Human readable ls for the current directory
 if [[ "$OS_TYPE" != "gnu-linux" ]]; then
     # OS X lt