Pyerrors

Added
- Allow providing lower triangular matrix constructed from a Cholesky decomposition in least squares function for correlated fits.

Fixed
- Corrected bug that prevented combined fits with multiple x-obs in some cases.

Changed
- Support for numpy 2 was added via a new autograd release
- Support for python<3.9 was dropped and dependencies were updated.

Fixed
- Minor bug fixes in input.sfcf

Fixed
- Fixed a bug in error computation when combining two Obs from the same ensemble and fluctuations on one replicum are not part of one of the Obs.

Added
- New special function module.

Fixed
- Various bug fixes in input module.

Added
- More efficient implementation of read_sfcf
- added support for addition and multiplication of complex numbers to Corr objects
- the Corr.GEVP method can now also propagate the errors for the eigenvectors

Fixed
- Fixed bug in combined fit with multiple independent variables
- Check for invalid set of configuration numbers added when initializing an Obs object.
- Fixed a bug in hadrons.read_hdf5

Added
- Vectorized `gamma_method` added which can be applied to lists or arrays of pyerrors objects.
- Wrapper for numerical integration of `Obs` valued functions with `Obs` valued intervals.
- Bootstrap import and export added.
- `matmul` overloaded for `Corr` class.
- More options for initializing `Corr` objects added.
- General Hadrons hdf5 reader added.
- New variant of second_derivative.
- CObs formatting added.
- Comparisons for `Corr` class added.

Changed
- support for python<3.8 was dropped and dependencies were updated.