is there any version of tbc bot with auto upgrade wall feature?

wait for next v5.5.2 for auto walls upgrade ...

Or you could download the latest version from their github which includes autowall. Keep in mind it will keep on using gold until it can't buy walls anymore

https://github.com/Konloch/Clash-Of-Clan...master.zip

autowall shall have atleast minimum gold or elix so that it will not affect the search cost when you attack again.