Update version numbers etc for v1.4.0

Author: james-d-mitchell

CITATION.cff

@@ -41,5 +41,5 @@ abstract: >-
   A Python package that wraps the functionality of the C++
   library libsemigroups.
 license: GPL-3.0+
-version: 1.3.0
-date-released: "2026-01-18"
+version: 1.4.0
+date-released: "2026-02-24"

README.md

@@ -150,10 +150,10 @@ uv pip install .
 To build `libsemigroups_pybind11` from a release archive:
 
 ```console
-curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.3.0.tar.gz
-tar -xf libsemigroups_pybind11-1.3.0.tar.gz
-rm -f libsemigroups_pybind11-1.3.0.tar.gz
-cd libsemigroups_pybind11-1.3.0
+curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.4.0.tar.gz
+tar -xf libsemigroups_pybind11-1.4.0.tar.gz
+rm -f libsemigroups_pybind11-1.4.0.tar.gz
+cd libsemigroups_pybind11-1.4.0
 pip install .
 ```
 

docs/source/changelog-v1.rst

@@ -8,6 +8,16 @@
 Changelog - version 1
 =====================
 
+v1.4.0 (released 24/02/2026)
+----------------------------
+
+This is a minor release including some improvements and new features:
+
+* Update to libsemigroups v3.5.0 and add the new features it contains.
+* transf: future proof ``__getitem__`` by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/382
+* todd-coxeter: update for changes in libsemigroups by @james-d-mitchell in https://github.com/libsemigroups/libsemigroups_pybind11/pull/388
+
+
 v1.3.0 (released 18/01/2026)
 ----------------------------
 

docs/source/install.rst

@@ -101,10 +101,10 @@ To build ``libsemigroups_pybind11`` from a release archive:
 
 ::
 
-    $ curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.3.0.tar.gz
-    $ tar -xf libsemigroups_pybind11-1.3.0.tar.gz
-    $ rm -f libsemigroups_pybind11-1.3.0.tar.gz
-    $ cd libsemigroups_pybind11-1.3.0
+    $ curl -L -O https://github.com/libsemigroups/libsemigroups_pybind11/releases/latest/download/libsemigroups_pybind11-1.4.0.tar.gz
+    $ tar -xf libsemigroups_pybind11-1.4.0.tar.gz
+    $ rm -f libsemigroups_pybind11-1.4.0.tar.gz
+    $ cd libsemigroups_pybind11-1.4.0
     $ pip install .
 
 Building the documentation