Update changelog and version identifier

Author: apdavison

CHANGELOG.md

@@ -53,3 +53,16 @@ For more detail see #29.
 
 - Added release candidate for openMINDS v4
 - Nodes in a collection are now sorted by ID.
+
+## Release 0.3.1 (2025-09-09)
+
+- includes fixes and additions to instance library, including:
+    - replacement of MRAcquisitionType by MRSpatialEncoding
+    - the addition of a Marmoset brain atlas, and some other new instances
+    - improved consistency of @id paths, spelling corrections, improved term definitions
+- more reliable export as JSON-LD: specifically when a property which expects a single value
+  has a list/tuple as a value, this would break JSON-LD export.
+  Now, although it is marked as a validation failure, this does not prevent export.
+- addition of a `Link` class, to allow making reference to remote graph nodes defined by their `@id`
+  that are not present locally.
+- improved CI testing: we now test v3 and v4, as well as "latest".

build.py

@@ -112,7 +112,7 @@
 
 env = Environment(loader=FileSystemLoader(os.path.dirname(os.path.realpath(__file__))), autoescape=select_autoescape())
 context = {
-    "version": "0.3.0",
+    "version": "0.3.1",
 }
 if args.branch == "development":
     context["version"] += ".dev"
@@ -130,6 +130,7 @@
 shutil.copy("pipeline/src/collection.py", "target/openminds/collection.py")
 shutil.copy("pipeline/src/README.md", "target/README.md")
 shutil.copy("./LICENSE", "target/LICENSE")
+shutil.copy("./CHANGELOG.md", "target/CHANGELOG.md")
 
 # If we have a PyPI release for the current version, complete the codemeta.json template
 try: