Update version numbers etc for v5.5.4

Author: wilfwilson

.VERSION

@@ -1 +1 @@
-5.5.3
+5.5.4

CHANGELOG.md

@@ -3,6 +3,12 @@ Copyright © 2011-2025 [James D. Mitchell][] et al.
 
 Licensing information can be found in the `LICENSE` file.
 
+## Version 5.5.4 (released 29/08/2025)
+
+This is a minor release that includes a technical change for compatibility with
+Digraphs v1.11.0, and which removes the use of the SmallGroup package in the
+Semigroups test suite.
+
 ## Version 5.5.3 (released 17/07/2025)
 
 This is a minor release including some changes for compatibility with GAP by

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 := "5.5.3",
-Date := "17/07/2025",  # dd/mm/yyyy format
+Version := "5.5.4",
+Date := "29/08/2025",  # dd/mm/yyyy format
 License := "GPL-3.0-or-later",
 
 ArchiveFormats := ".tar.gz",

VERSIONS

@@ -9,6 +9,7 @@
 ##
 ##
 
+release 5.5.4  - 29/08/2025
 release 5.5.3  - 17/07/2025
 release 5.5.2  - 11/07/2025
 release 5.5.1  - 19/06/2025