Eztao

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- Drop support for Python 3.7
- Bump `numba` requirement to `>=0.57.0`.
- **New Features:** Added seed options to `gpSimRand`, `gpSimFull`, and `addNoise`
- **Bug fixes:** 74, 75

+++++++++++++++++++++
- Update reference to numpy bool/complex (71)
- **Bug fixes:** 50, 54, 59

+++++++++++++++++++++
- Fitting functions (i.e., `drw_fit`) are now fully modular (allow user provided optimization function, prior function and etc.)
- A new `addNoise` function to simulated random noise given measurement errors.
- **Bug fixes:** 44
- **API changes:** `n_iter` -> `n_opt` in fitting functions.

+++++++++++++++++++++

- update parameter initialization in fit functions; removed `de` option 26, 27
- add few utils functions 30, 25
- add mcmc module 29
- ts simulation now support linear error
- added online documentation

++++++++++++++++++

- add methods to CARMA_term conversion between CARMA and poly space
- fixed bugs and add tests for model 2nd order stat functions
- close 2, close 10

++++++++++++++++++

- A bunch bug fixes in the ts.carma module
- Improved _min_opt optimizer, now added to all fitting functions
- Now using minimizer instead of differential evolution may result in more robust parameter estimates.