update changelog and upversion

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## v0.8.8
+* Added the ability to read and write files according the HIF functionality standard [#572](https://github.com/xgi-org/xgi/pull/572) (@nwlandry).
+* Implemented the `add_node_to_edge` and `remove_node_from_edge` methods for DiHypergraphs [#571](https://github.com/xgi-org/xgi/pull/571) (@nwlandry).
+* Allow empty edges [#565](https://github.com/xgi-org/xgi/pull/565)
+* Simplified the `cleanup()` methods [#569](https://github.com/xgi-org/xgi/pull/569) (@nwlandry).
+* Fix Issue [#566](https://github.com/xgi-org/xgi/issues/566) [#567](https://github.com/xgi-org/xgi/pull/567) (@maximelucas).
+* Added documentation about N vs. N-1 in the `var()` and `std()` methods in the stats module [#562](https://github.com/xgi-org/xgi/pull/562) (@nwlandry).
+* Fix Issue [#552](https://github.com/xgi-org/xgi/issues/552) [#561](https://github.com/xgi-org/xgi/pull/561) (@nwlandry).
+
 ## v0.8.7
 * Renamed the `_hypergraph` internal variable to `_net_attr` [#560](https://github.com/xgi-org/xgi/pull/560) (@nwlandry).
 * Get rid of KeyErrors in `to_line_graph`  [#558](https://github.com/xgi-org/xgi/pull/558) (@pgberlureau).

HOW_TO_CONTRIBUTE.md

@@ -22,6 +22,7 @@ Please note we have a [code of conduct](/CODE_OF_CONDUCT.md), please follow it i
 10. You may merge the Pull Request in once you have the sign-off of at least one other developer, or if you do not have permission to do that, you may request the reviewer to merge it for you.
 
 ## New Version process
+
 1. Make sure that the Github Actions workflow runs without any errors.
 2. Using the `github-changelog` package (a dependency in the [release](requirements/release.txt) requirements file), run `changelog -m xgi-org xgi [last release tag]` to get the merged pull requests with their links. Paste this into the changelog file under a new heading and edit to make more legible. Associate a GitHub username with each pull request.
 3. Increase the version number in [\_\_init\_\_.py](xgi/__init__.py.py) and [conf.py](docs/source/conf.py) to the new version agreed upon by the core developers. The versioning scheme we use is [SemVer](http://semver.org/).

docs/source/conf.py

@@ -21,7 +21,7 @@
 # -- Project information -----------------------------------------------------
 project = "XGI"
 copyright = "Copyright (C) 2021-2024 XGI Developers"
-release = "0.8.7"
+release = "0.8.8"
 
 # -- General configuration ---------------------------------------------------
 

xgi/__init__.py

@@ -22,4 +22,4 @@
 from .stats import *
 
 
-__version__ = "0.8.7"
+__version__ = "0.8.8"