Update version numbers etc for v5.2.1

.VERSION

@@ -1 +1 @@
-5.2.0
+5.2.1

.mailmap

@@ -14,6 +14,7 @@ Julius Jonusas <j.jonusas@gmail.com> Julius <unknown>
 Julius Jonusas <j.jonusas@gmail.com> jj <unknown>
 Olexandr Konovalov <obk1@st-andrews.ac.uk> Alexander Konovalov <alex-konovalov@users.noreply.github.com>
 Olexandr Konovalov <obk1@st-andrews.ac.uk> Alexander Konovalov <alexk@mcs.st-andrews.ac.uk>
+Olexandr Konovalov <obk1@st-andrews.ac.uk> Olexandr Konovalov <5751387+olexandr-konovalov@users.noreply.github.com>
 Artemis Konstantinidi <ak316@st-andrews.ac.uk> artemiskonst <97620468+artemiskonst@users.noreply.github.com>
 James Mitchell <jdm3@st-andrews.ac.uk> <jdm3@st-and.ac.uk>
 James Mitchell <jdm3@st-andrews.ac.uk> <jdm3@st-andrews.ac.uk>

CHANGELOG.md

@@ -1,8 +1,13 @@
 # CHANGELOG – [Semigroups package][] for [GAP][]
-Copyright © 2011-2022 [James D. Mitchell][] et al.
+Copyright © 2011-2023 [James D. Mitchell][] et al.
 
 Licensing information can be found in the `LICENSE` file.
 
+### Version 5.2.1 (released 05/03/2023)
+
+This is a minor release with some changes for compatibility with upcoming
+changes to GAP, and some updates to the build system.
+
 ### Version 5.2.0 (released 01/12/2022)
 
 This release contains a number of fixes and improvements, and one new feature,

PackageInfo.g

@@ -34,8 +34,8 @@ _STANDREWSCS := Concatenation(["Jack Cole Building, North Haugh, ",
 SetPackageInfo(rec(
 PackageName := "Semigroups",
 Subtitle := "A package for semigroups and monoids",
-Version := "5.2.0",
-Date := "01/12/2022",  # dd/mm/yyyy format
+Version := "5.2.1",
+Date := "05/03/2023",  # dd/mm/yyyy format
 License := "GPL-3.0-or-later",
 
 ArchiveFormats := ".tar.gz",

README.md

@@ -1,6 +1,6 @@
 # README - Semigroups package for GAP
 
-#### Copyright (C) 2011-2022 James D. Mitchell et al.<br />Licensing information is available in the LICENSE file.
+#### Copyright (C) 2011-2023 James D. Mitchell et al.<br />Licensing information is available in the LICENSE file.
 
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.592893.svg)](https://doi.org/10.5281/zenodo.592893)
 
@@ -17,7 +17,7 @@ This will create a subdirectory `semigroups-x.x.x`.
 
 ## Issues
 
-For questions, remarks, suggestions, and issues please use the 
+For questions, remarks, suggestions, and issues please use the
 [issue tracker](https://github.com/gap-packages/Semigroups/issues).
 
 ## Installation
@@ -30,13 +30,13 @@ The following is a summary of the steps that should lead to a successful
 installation of [Semigroups][]:
 
 * get the [datastructures](https://gap-packages.github.io/datastructures)
-  package version 0.2.5 or higher 
+  package version 0.2.5 or higher
 
 * ensure that the [Digraphs][] package version 1.2.0 or higher is available.
   [Digraphs][] must be compiled before [Semigroups][] can be loaded.
 
 * get the [genss](https://gap-packages.github.io/genss) package version 1.6.5 or
-  higher 
+  higher
 
 * get the [images](https://gap-packages.github.io/images) package version 1.3.0 or
 
@@ -52,7 +52,7 @@ Both [orb][] and [Semigroups][] perform better when [orb][] is compiled, so comp
 
 * unzip and untar the file `semigroups-x.x.x.tar.gz`, for example, using
 
-    ``` 
+    ```
     gunzip semigroups-x.x.x.tar.gz; tar xvf semigroups-x.x.x.tar
     ```
 
@@ -75,7 +75,7 @@ Both [orb][] and [Semigroups][] perform better when [orb][] is compiled, so comp
 
   For the latter case, you need a working [pkg-config][] tool; assuming
   [libsemigroups][] was installed at location `/foo/bar`, type
-    
+
     * `PKG_CONFIG_PATH=/foo/bar/lib/pkgconfig ./configure --with-external-libsemigroups`
     * `make`
 

VERSIONS

@@ -9,6 +9,7 @@
 ##
 ##
 
+release 5.2.1  - 05/03/2023
 release 5.2.0  - 01/12/2022
 release 5.1.0  - 31/10/2022
 release 5.0.2  - 12/08/2022