Log Message:
tex-incgraph{,-doc}: update to 1.3.0

### Added
- Option `overlay page number options app`
- Option `xshift`
- Option `yshift`
- Autosize Options:
    - Option `autosize`
    - Option `autosize width gap`
    - Option `autosize height gap`
    - Option `autosize gap`
    - Option `autosize min scale`
    - Option `autosize max scale`

### Changed
- Implementation overhauled and completely rewritten in LaTeX3.
    Major changes of the whole code.
    Option keys kept to be pgfkeys.
- `\igrboxcenter` drops box now after usage

### Fixed
- Documentation typo