MAINT: update software environment

environment.yml

@@ -2,16 +2,16 @@ name: quantecon
 channels:
   - default
 dependencies:
-  - python=3.8
-  - anaconda=2021.11
+  - python=3.12
+  - anaconda=2024.10
   - pip
   - pip:
-    - jupyter-book==0.12.1
-    - quantecon-book-theme==0.3.0
-    - sphinx-tojupyter==0.2.0
+    - jupyter-book==0.15.1
+    - quantecon-book-theme==0.7.2
+    - sphinx-tojupyter==0.3.0
     - sphinxext-rediraffe==0.2.7
-    - sphinx-exercise==0.2.1
-    - ghp-import==1.1.0
+    - sphinx-exercise==0.4.1
+    - ghp-import==2.1.0
     - sphinxcontrib-youtube
     - sphinx-proof
     - quantecon