toggleBlinking(isBlinking) {
    if (!this.cursor) return;
    // if in paused state, don't toggle blinking a 2nd time
    if (this.pause.status) return;
    if (this.cursorBlinking === isBlinking) return;
    this.cursorBlinking = isBlinking;
    if (isBlinking) {
      this.cursor.classList.add('typed-cursor--blink');
    } else {
      this.cursor.classList.remove('typed-cursor--blink');
    }
  }
Toggle the blinking cursor
@param {boolean} isBlinking
@private