⬆️ Upgrade build software and dependencies (#274)

* ⬆️ Upgrade build software and dependencies

- Upgrade anaconda to 2025.12
- Upgrade quantecon-book-theme to 0.15.1
- Add jupyter-book version constraint (<2.0)
- Configure Dependabot for conda ecosystem with jupyter-book restriction
- Temporarily disable build cache for full execution check

* Update collab.yml to use current package versions matching environment.yml

- jupyter-book: 0.15.1 -> >=1.0.4post1,<2.0
- sphinx-exercise: 0.4.1 -> 1.2.1 (fixes exercise_style config warning)
- quantecon-book-theme: 0.7.1 -> 0.15.1
- sphinx-tojupyter: 0.3.0 -> 0.6.0
- sphinxext-rediraffe: 0.2.7 -> 0.3.0
- sphinxcontrib-youtube: 1.1.0 -> 1.4.1
- sphinx-togglebutton: 0.3.1 -> 0.3.2
- Added sphinx-proof 0.3.0, sphinx-reredirects 1.0.0
- Removed docutils==0.17.1, arviz==0.13.0 (not in environment.yml)

* Fix pip install command in collab.yml - remove escaped < character

* ⬆️ Configure dependabot to ignore Python version updates

Python version should be constrained by the anaconda distribution version
specified in environment.yml, not updated independently by dependabot.

* Fix dependabot python ignore rule to include versions constraint

* Re-enable build cache in CI workflow

Author: mmcky

.github/dependabot.yml

@@ -11,3 +11,16 @@ updates:
       prefix: ⬆️
     schedule:
       interval: weekly
+
+  - package-ecosystem: "conda"
+    directory: "/"
+    commit-message:
+      prefix: ⬆️
+    schedule:
+      interval: weekly
+    ignore:
+      - dependency-name: "jupyter-book"
+        versions: [">=2.0"]
+      - dependency-name: "python"
+        # Python version should be constrained by the anaconda distribution version
+        versions: [">0"]

.github/workflows/collab.yml

@@ -32,7 +32,7 @@ jobs:
       - name: Install Build Software
         shell: bash -l {0}
         run: |
-          pip install jupyter-book==0.15.1 docutils==0.17.1 quantecon-book-theme==0.7.1 sphinx-tojupyter==0.3.0 sphinxext-rediraffe==0.2.7 sphinx-exercise==0.4.1 sphinxcontrib-youtube==1.1.0 sphinx-togglebutton==0.3.1 arviz==0.13.0
+          pip install "jupyter-book>=1.0.4post1,<2.0" quantecon-book-theme==0.15.1 sphinx-tojupyter==0.6.0 sphinxext-rediraffe==0.3.0 sphinx-exercise==1.2.1 sphinx-proof==0.3.0 sphinxcontrib-youtube==1.4.1 sphinx-togglebutton==0.3.2 sphinx-reredirects==1.0.0
       # Build of HTML (Execution Testing)
       - name: Build HTML
         shell: bash -l {0}

environment.yml

@@ -3,11 +3,11 @@ channels:
   - default
 dependencies:
   - python=3.13
-  - anaconda=2025.06
+  - anaconda=2025.12
   - pip
   - pip:
-    - jupyter-book==1.0.4post1
-    - quantecon-book-theme==0.15.0
+    - jupyter-book>=1.0.4post1,<2.0
+    - quantecon-book-theme==0.15.1
     - sphinx-tojupyter==0.6.0
     - sphinxext-rediraffe==0.3.0
     - sphinx-exercise==1.2.1