Semantic version greater than bash function

# vgt $oldver $newver - version greater than test
function vgt() {
  parts=(${1//./ })
  major=${parts[0]}
  minor=${parts[1]}
  newparts=(${2//./ })
  newmajor=${newparts[0]}
  newminor=${newparts[1]}
  if (( $major < $newmajor )); then
    return 0
  elif (( $major == $newmajor )) && (( $minor < $newminor )); then
    return 0
  else
    return 1
  fi
}