feat: make fd and rg follow symlinks

Noticed that neither of these were showing symlinks. Example from my
dotfiles, these two files in `bin/`:

    update-bundle -> ../aspects/nvim/support/update-bundle
    update-help-tags -> ../aspects/nvim/support/update-help-tags

`:CommandTFd` and `:CommandTRipgrep` were showing the link targets but
not the links themselves when searching for "update".

Author: wincent

lua/wincent/commandt/private/finders/fd.lua

@@ -9,7 +9,7 @@ local pushd = require('wincent.commandt.pushd')
 local fd = {
   command = function(directory, _options)
     pushd(directory)
-    local command = 'fd --hidden --print0 --type file --search-path . 2> /dev/null'
+    local command = 'fd --follow --hidden --print0 --type file --search-path . 2> /dev/null'
     local drop = 2 -- drop './'
     return command, drop
   end,

lua/wincent/commandt/private/finders/rg.lua

@@ -9,7 +9,7 @@ local pushd = require('wincent.commandt.pushd')
 local rg = {
   command = function(directory, _options)
     pushd(directory)
-    local command = 'rg --files --null 2> /dev/null'
+    local command = 'rg --files --follow --no-messages --null 2> /dev/null'
     local drop = 0
     return command, drop
   end,