Xtgeo

What's Changed
* Drop support for Python 3.6. Python 3.7 to 3.11 are supported.
* As a consequence of skipping Python 3.6, Python in RMS 12.0 (Roxar API version 1.4) and earlier is not supported from this version.
* Functions and methods with deprecation warnings marked for removal in xtgeo 3.0 are now removed. These are:
* Grid() class: `numpify_carrays(), get_cactnum(), get_indices()`
* BasePlot() class: `set_colortable()`
* RegularSurface() class: `get_zval(), set_zval(), ensure_correct_values()`, use of `nx, ny` in class instantiating (use `ncol, nrow` instead)


**Full Changelog**: https://github.com/equinor/xtgeo/compare/2.21.3...3.0.0

What's Changed
* BUG: correct threshold on dataframe length wrt attrs by jcrivenaes in https://github.com/equinor/xtgeo/pull/854
* Release xtgeo version 3.0 (part 1) by jcrivenaes in https://github.com/equinor/xtgeo/pull/857


**Full Changelog**: https://github.com/equinor/xtgeo/compare/2.21.3...3.0.0-rc1

What's Changed
* Code cleanup mar 23 by jcrivenaes in https://github.com/equinor/xtgeo/pull/851
* BUG: Allow ECL kwords with spaces when checking by jcrivenaes in https://github.com/equinor/xtgeo/pull/853


**Full Changelog**: https://github.com/equinor/xtgeo/compare/2.21.2...2.21.3

What's Changed
* Fix reading IX restart files by jcrivenaes in https://github.com/equinor/xtgeo/pull/848


**Full Changelog**: https://github.com/equinor/xtgeo/compare/2.21.1...2.21.2

What's Changed
* BLD: more fine grained numpy ver. build dep. by jcrivenaes in https://github.com/equinor/xtgeo/pull/847


**Full Changelog**: https://github.com/equinor/xtgeo/compare/2.21.0...2.21.1