bugfix: 'lgrep_curbuf,' 'tags_live_grep' on fish shell (closes #357)

lua/fzf-lua/providers/grep.lua

@@ -44,7 +44,7 @@ local get_grep_cmd = function(opts, search_query, no_esc)
   if opts.filespec and #opts.filespec>0 then
     search_path = opts.filespec
   elseif opts.filename and #opts.filename>0 then
-    search_path = vim.fn.shellescape(opts.filename)
+    search_path = libuv.shellescape(opts.filename)
   end
 
   search_query = search_query or ''

lua/fzf-lua/providers/tags.lua

@@ -1,6 +1,7 @@
 local core = require "fzf-lua.core"
 local path = require "fzf-lua.path"
 local utils = require "fzf-lua.utils"
+local libuv = require "fzf-lua.libuv"
 local config = require "fzf-lua.config"
 local make_entry = require "fzf-lua.make_entry"
 
@@ -13,7 +14,7 @@ local function get_tags_cmd(opts, flags)
     cmd = "rg"
   end
   if opts.search and #opts.search>0 then
-    query = vim.fn.shellescape(opts.no_esc and opts.search or
+    query = libuv.shellescape(opts.no_esc and opts.search or
       utils.rg_escape(opts.search))
   elseif opts._curr_file and #opts._curr_file>0 then
     query = vim.fn.shellescape(opts._curr_file)