Download and compile the latest sshpass since homebrew will not allow it's use anymore in Catalina.

install_sshpass_macos.sh

#!/bin/bash

if [ "$(xcode-select -p 1>/dev/null; echo $?)" -ne 0 ]; then xcode-select --install; fi && \
curl -O -L -J https://sourceforge.net/projects/sshpass/files/latest/download && \
ARCHIVE="$(find . -name sshpass*.tar.gz -ctime -30s)" && \
tar xvzf "$ARCHIVE" && \
cd "${ARCHIVE%%.*}" && \
echo "./configure" && \
echo "make" && \
echo "sudo make install" && \
cd - && \
sshpass -V