TEST: Update sphinx-tojupyter to PR#56 (feature/myst-nb-glue-support)

Author: mmcky

environment.yml

@@ -8,7 +8,7 @@ dependencies:
   - pip:
     - jupyter-book==1.0.4post1
     - quantecon-book-theme==0.10.1
-    - sphinx-tojupyter==0.3.1
+    - git+https://github.com/QuantEcon/sphinx-tojupyter.git@feature/myst-nb-glue-support
     - sphinxext-rediraffe==0.2.7
     - sphinx-exercise==1.2.0
     - sphinx-proof==0.2.1