ENH: sphinx >=4,<6 (#644)

* sphinx-version

* sphinx version

Author: AakashGfude

.github/workflows/tests.yml

@@ -26,14 +26,14 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         python-version: [3.7, 3.8, 3.9]
-        sphinx: [">=3,<4", ">=4,<5"]
+        sphinx: [">=4,<5", ">=5,<6"]
         include:
         - os: windows-latest
           python-version: 3.9
-          sphinx: ">=3,<4"
+          sphinx: ">=4,<5"
         - os: macos-latest
           python-version: 3.9
-          sphinx: ">=4,<5"
+          sphinx: ">=5,<6"
     runs-on: ${{ matrix.os }}
 
     steps:

pyproject.toml

@@ -22,7 +22,7 @@ readme = "README.md"
 
 requires-python = ">=3.7"
 dependencies = [
-  "sphinx>=3,<6",
+  "sphinx>=4,<6",
   "pydata-sphinx-theme~=0.10.1",
   "pyyaml",
 ]