Fix a bug that lsp server doesn't attach

lua/mappings.lua

@@ -48,7 +48,7 @@ map('', '<leader>tt', ':TagbarToggle<cr>', { silent = true })
 map('', '<C-n>', ':NvimTreeToggle<cr>', { silent = true })
 
 -- toggle formatter
-map('', '<leader>fm', ':lua vim.lsp.buf.formatting()<cr>', { silent = true })
+map('', '<leader>fm', ':lua vim.lsp.buf.format({async = true})<cr>', { silent = true })
 
 -- toggle Hop
 map('', '<leader>b', ':HopWordBC<cr>', { silent = true })

lua/plugins.lua

@@ -72,7 +72,7 @@ return require('packer').startup(function(use)
 	}
 
 	-- formating and editing
-	use { "williamboman/mason.nvim", event = "UIEnter" }
+	use { "williamboman/mason.nvim", event = 'BufEnter'}
 	use {
 		'windwp/nvim-autopairs',
 		after = 'nvim-cmp',
@@ -133,11 +133,6 @@ return require('packer').startup(function(use)
 	}
 
 	-- eye-candy
-	use {
-		'lukas-reineke/indent-blankline.nvim',
-		after = { 'nvim-treesitter' },
-		config = function() require 'plugins.indent-blankline' end
-	}
 	use {
 		'lewis6991/gitsigns.nvim',
 		event = 'UIEnter',