class String
  def increment_version
    short_version_parts = self.split('.')
    last_digit = short_version_parts.last.to_i + 1
    $stdout.puts 'Incrementing version...'
    "#{short_version_parts.first(short_version_parts.length-1).join(".")}.#{last_digit}"
  end
  def increment_version!
    replace increment_version
  end
  def is_number?
    true if Float(self) rescue false
  end
end