Bump the referencing version depended on.

docs/requirements.txt

@@ -2,7 +2,7 @@
 # This file is autogenerated by pip-compile with Python 3.11
 # by the following command:
 #
-#    pip-compile docs/requirements.in
+#    pip-compile --resolver=backtracking docs/requirements.in
 #
 alabaster==0.7.13
     # via sphinx
@@ -27,9 +27,7 @@ fonttools==4.38.0
 furo==2022.12.7
     # via -r docs/requirements.in
 idna==3.4
-    # via
-    #   requests
-    #   yarl
+    # via requests
 imagesize==1.4.1
     # via sphinx
 jinja2==3.1.2
@@ -40,10 +38,8 @@ kiwisolver==1.4.4
     # via matplotlib
 markupsafe==2.1.2
     # via jinja2
-matplotlib==3.6.3
+matplotlib==3.7.0
     # via sphinxext-opengraph
-multidict==6.0.4
-    # via yarl
 numpy==1.24.2
     # via
     #   contourpy
@@ -71,15 +67,15 @@ python-dateutil==2.8.2
     # via matplotlib
 pytz==2022.7.1
     # via babel
-referencing==0.14.0
+referencing==0.16.4
     # via jsonschema-specifications
 requests==2.28.2
     # via sphinx
 six==1.16.0
     # via python-dateutil
 snowballstemmer==2.2.0
     # via sphinx
-soupsieve==2.3.2.post1
+soupsieve==2.4
     # via beautifulsoup4
 sphinx==6.1.3
     # via
@@ -107,9 +103,7 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 sphinxcontrib-spelling==7.7.0
     # via -r docs/requirements.in
-sphinxext-opengraph==0.8.0
+sphinxext-opengraph==0.8.1
     # via -r docs/requirements.in
 urllib3==1.26.14
     # via requests
-yarl==1.8.2
-    # via referencing

pyproject.toml

@@ -32,7 +32,7 @@ classifiers = [
 dynamic = ["version"]
 
 dependencies = [
-  "referencing>=0.12.1",
+  "referencing>=0.16.4",
   "importlib_resources>=1.4.0;python_version<'3.9'",
 ]