Move Telescope from master to 0.1.x branch

Follow Telescope's README suggestion and use 0.1.x branch instead of
master

init.lua

@@ -24,7 +24,9 @@ require('packer').startup(function(use)
   use 'nvim-lualine/lualine.nvim'                                           -- Fancier statusline
   use 'lukas-reineke/indent-blankline.nvim'                                 -- Add indentation guides even on blank lines
   use 'tpope/vim-sleuth'                                                    -- Detect tabstop and shiftwidth automatically
-  use { 'nvim-telescope/telescope.nvim', requires = { 'nvim-lua/plenary.nvim' } } -- Fuzzy Finder (files, lsp, etc)
+
+  -- Fuzzy Finder (files, lsp, etc)
+  use { 'nvim-telescope/telescope.nvim', branch = '0.1.x', requires = { 'nvim-lua/plenary.nvim' } }
 
   -- Fuzzy Finder Algorithm which requires local dependencies to be built. Only load if `make` is available
   use { 'nvim-telescope/telescope-fzf-native.nvim', run = 'make', cond = vim.fn.executable "make" == 1 }