Update requirements, drop pytest-subtests.

Closes: #283

Author: Julian

docs/requirements.txt

@@ -10,9 +10,9 @@ babel==2.17.0
     # via sphinx
 beautifulsoup4==4.14.2
     # via furo
-certifi==2025.10.5
+certifi==2025.11.12
     # via requests
-charset-normalizer==3.4.3
+charset-normalizer==3.4.4
     # via requests
 docutils==0.21.2
     # via sphinx
@@ -50,7 +50,7 @@ requests==2.32.5
     #   sphinxcontrib-spelling
 roman-numerals-py==3.1.0
     # via sphinx
-rpds-py==0.27.1
+rpds-py==0.29.0
     # via referencing
 snowballstemmer==3.0.1
     # via sphinx

test-requirements.in

@@ -1,3 +1,2 @@
 file:.
-pytest
-pytest-subtests
+pytest>9

test-requirements.txt

@@ -1,24 +1,18 @@
 # This file was autogenerated by uv via the following command:
 #    uv pip compile --output-file /Users/julian/Development/referencing/test-requirements.txt test-requirements.in
 attrs==25.4.0
-    # via
-    #   pytest-subtests
-    #   referencing
-iniconfig==2.1.0
+    # via referencing
+iniconfig==2.3.0
     # via pytest
 packaging==25.0
     # via pytest
 pluggy==1.6.0
     # via pytest
 pygments==2.19.2
     # via pytest
-pytest==8.4.2
-    # via
-    #   -r test-requirements.in
-    #   pytest-subtests
-pytest-subtests==0.14.2
+pytest==9.0.1
     # via -r test-requirements.in
 referencing @ file:.
     # via -r test-requirements.in
-rpds-py==0.27.1
+rpds-py==0.29.0
     # via referencing