v2.1.0

• Patched:
  • change(&mut self, input: &char, pos: usize) in Extras
• New Feature:
  • .next_to_left()
  • .next_to_right()
  • If next or jump can effect the Extras.
    • .noeffects()
    • .noeffects_mut()
    • .noeffects_on()
    • .noefeects_off()
  • Bump until meets fn = true.
    • .next_to_until(fn)
  • Bump while fn = true.
    • .next_to_while(fn)
  • Cloning saved().extras to self.extras().
    • .to_range_extras()