Starfit

What's Changed
* add sqrtm - but current use did not result in satisfactory results by 2sn in https://github.com/conradtchan/starfit/pull/173
* add det-cov fixes for analytic/single solvers by 2sn in https://github.com/conradtchan/starfit/pull/174


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.16.2...0.16.3

What's Changed
* add/update matrix plots by 2sn in https://github.com/conradtchan/starfit/pull/170


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.16.1...0.16.2

What's Changed
* regression for matrix optimisation by 2sn in https://github.com/conradtchan/starfit/pull/169


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.16.0...0.16.1

What's Changed
* update calculation of ert by 2sn in https://github.com/conradtchan/starfit/pull/164
* update for cov + det by 2sn in https://github.com/conradtchan/starfit/pull/165


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.15.0...0.16.0

Temporary fix for covariance and detection limit - disable later when former are used.

What's Changed
* update plot axis label option by 2sn in https://github.com/conradtchan/starfit/pull/160
* add covariance matrix plot, fix cov by 2sn in https://github.com/conradtchan/starfit/pull/163


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.14.4...0.15.0

What's Changed
* fix labels for single stars by 2sn in https://github.com/conradtchan/starfit/pull/159


**Full Changelog**: https://github.com/conradtchan/starfit/compare/0.14.3...0.14.4