1.1.5

- [ ] Autosize issues
    - [ ] setAutoSize returns non-onbject (#162)
    - [ ] setAutoSize(true) does not autosize accurately (#163)
- [x] Select sheets by index (#165)
- [ ] Separator config typo (#160)
- [ ] Separate `setTitle()` and `setFileName()` (#161)
- [ ] Disable calculations during export (#164)