Poetry: bump Sphinx to 7.3.7

Handle new dependency issues.

noxfile.py

@@ -120,19 +120,22 @@ def _install(session, docutils=None, sphinx=None, dist='wheel',
     if docutils:
         session.run("pip", "install", f"docutils=={docutils}")
     if sphinx:
-        session.run("pip", "install", f"sphinx=={sphinx}")
+        deps = [f"sphinx=={sphinx}"]
         major, _ = sphinx.split('.', maxsplit=1)
         if int(major) < 4:
             # https://github.com/sphinx-doc/sphinx/issues/10291
-            session.run("pip", "install", "jinja2<3.1")
+            deps.append("jinja2<3.1")
+        elif int(major) < 6:
+            deps.append("myst-parser==0.18.1")
         if int(major) < 5:
             # https://github.com/sphinx-doc/sphinx/issues/11890
-            session.run("pip", "install", "alabaster==0.7.13")
-            session.run("pip", "install", "sphinxcontrib-applehelp==1.0.4")
-            session.run("pip", "install", "sphinxcontrib-devhelp==1.0.2")
-            session.run("pip", "install", "sphinxcontrib-htmlhelp==2.0.1")
-            session.run("pip", "install", "sphinxcontrib-serializinghtml==1.1.5")
-            session.run("pip", "install", "sphinxcontrib-qthelp==1.0.3")
+            deps.append("alabaster==0.7.13")
+            deps.append("sphinxcontrib-applehelp==1.0.4")
+            deps.append("sphinxcontrib-devhelp==1.0.2")
+            deps.append("sphinxcontrib-htmlhelp==2.0.1")
+            deps.append("sphinxcontrib-serializinghtml==1.1.5")
+            deps.append("sphinxcontrib-qthelp==1.0.3")
+        session.run("pip", "install", *deps)
 
 
 def _unit(session, docutils=None, sphinx=None, dist='wheel',

noxutil.py

@@ -39,7 +39,7 @@ def get_versions(
     package = Factory().create_poetry(Path(__file__).parent).package
     requirements = [
         requirement
-        for requirement in package.requires
+        for requirement in package.all_requires
         if requirement.name == dependency
     ]
     if not requirements:

pyproject.toml

@@ -87,16 +87,12 @@ rinoh = "rinoh.frontend.sphinx"
 python = "^3.8.0"
 appdirs = "^1.4.3"
 docutils = ">=0.15"
-myst-parser = "^0.18.1"
+myst-parser = ">=0.18.1"
 packaging = ">=14.0"
 rinoh-typeface-dejavuserif = "^0.1.3"
 rinoh-typeface-texgyrecursor = "^0.1.1"
 rinoh-typeface-texgyreheros = "^0.1.1"
 rinoh-typeface-texgyrepagella = "^0.1.1"
-Sphinx = [
-  {version = ">=2.2.1", python = "<3.10", optional = true},
-  {version = ">=2.2.1,!=3.5.*,!=4.0.*,!=4.1.*", python = ">=3.10", optional = true}
-]
 
 [tool.poetry.group.dev.dependencies]
 doc8 = "^1.0.0"
@@ -109,7 +105,12 @@ pytest-console-scripts = "^1.3"
 pytest-cov = "^5.0.0"
 pytest-xdist = "^3.0.2"
 restview = "^3.0.0"
-Sphinx = "^5.2.1"
+Sphinx = [
+  {version = ">=2.2.1,<7.2.0", python = "<3.9"},
+  {version = ">=2.2.1", python = "3.9"},
+  {version = ">=2.2.1,!=3.5.*,!=4.0.*,!=4.1.*", python = ">=3.10"}
+]
+defusedxml = ">=0.7.1"  # for Sphinx>=7.3
 sphinx-immaterial = ">=0.10"
 sphinxcontrib-autoprogram = "^0.1.7"
 pytest-github-actions-annotate-failures = { version = "^0.2.0", optional = true }