Update: latest platform tools 31.0.0 ADB version 1.0.41
$ git clone https://github.com/rendiix/termux-adb-fastboot.git
$ cd termux-adb-fastboot
$ bash install.sh
$ adb --version
Android Debug Bridge version 1.0.41
Version platform-tools-31.0.0-gkdev
Installed as /data/data/com.termux/files/usr/bin/adb