See,

$ find . -name "*.sh" | xargs shellcheck -i SC2059

In ./version.sh line 34:
printf "${VER}"
       ^------^ SC2059: Don't use variables in the printf format string. Use printf '..%s..' "$foo".

For more information:
  https://www.shellcheck.net/wiki/SC2059 -- Don't use variables in the printf...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>