typo Bdelete instead of bdelete (#666)

lua/lv-bufferline/init.lua

@@ -9,8 +9,8 @@ M.config = function()
             buffer_close_icon = '',
             modified_icon = '●',
             close_icon = '',
-            close_command = "Bdelete %d",
-            right_mouse_command = "Bdelete! %d",
+            close_command = "bdelete %d",
+            right_mouse_command = "bdelete! %d",
             left_trunc_marker = '',
             right_trunc_marker = '',
             offsets = {