feat!: switch persist_mode to false (#410)

by default toggleterm will now remember what mode you were last in when leaving a terminal

Author: mawkler

lua/toggleterm/config.lua

@@ -45,7 +45,7 @@ local config = {
   terminal_mappings = true,
   start_in_insert = true,
   persist_size = true,
-  persist_mode = false,
+  persist_mode = true,
   close_on_exit = true,
   direction = "horizontal",
   shading_factor = constants.shading_amount,