Alias xdg-open to open

Usually don't favor the macOS naming, but I'm sick and tired of typing out
`xdg-open` instead of just `open`

aliases

@@ -11,6 +11,9 @@ if [[ `uname` == Darwin ]]; then
   alias ls='gls --color=auto'
 else
   alias ls='ls --color=auto'
+
+  # And standardize to macOS naming
+  alias open='xdg-open'
 fi
 
 # Colorize output and some exclusions