update changelog

Author: sbillinge

CHANGELOG.rst

@@ -4,6 +4,49 @@ Release Notes
 
 .. current developments
 
+3.1.0
+=====
+
+**Added:**
+
+* numpy >= 2.0 support
+* Codecov coverage report in PRs
+* Spelling check with Codespell in pre-commit
+* Added Whittaker-Shannon interpolation option for grid_interpolation.
+* Added support for python 3.13
+* no-news needed: just tweaking installation instructions
+
+**Changed:**
+
+*  Package reformatted to comply with new Billinge Group package structure
+* Changed the removed local manual link to the online page.
+* Use WS interpolation for Nyquist grid.
+* Refreshed tutorial manual and brought documentation up to date
+* Plots now use colors from the billinge-group matplotlib stylesheet, bg-mpl-stylesheets
+* Updated install instructions in README.rst.
+
+**Fixed:**
+
+* Change background color to match system settings in `Phase Configuration`.
+* inability to find gui resources bug in py < 3.12
+* fixed date rendering in 'about' dialog box
+* fix "absent from setuptools' packages configuration" warnings during python -m build
+* use conda.txt instead of run.txt for conda package dependencies
+* remove conda-recipe folder - feedstock repo has the latest version
+* two warnings with (1) linestyle redundantly defined and (2) no artists with labels found to put in legend
+* Use miniforge in CI to avoid strange error of incorrect MacOS version logged from base     env
+* Re-cookiecut to include GH issues templates, getting started, and install updates
+* Fixed TypeError when using Nyquist interp.
+* Fixed online manual not showing images.
+* Code linted up to PEP8 and group standards
+
+**Removed:**
+
+* Removed wx3 support that was previously deprecated.
+* Remove diffpy.structure and numpy in macOS Arm64 readme installation since they are installed by other conda-forge dependencies.
+* six dependency in run.txt
+
+
 v3.0.5
 ====================