feat: Add support for Tutor 19 / Open edX Sumac

* Update the install_requires list to support Tutor 19.
* Update the compatibility matrix in the README accordingly.

CHANGELOG.md

@@ -1,3 +1,7 @@
+## Unreleased
+
+* [Enhancement] Support Tutor 19 and Open edX Sumac.
+
 ## Version 4.0.0 (2024-10-07)
 
 * [Enhancement] Drop support for Python 3.8; update the Ubuntu base image to

README.md

@@ -38,6 +38,8 @@ appropriate one:
 | Palm              | `>=16.0, <17`      | `quince`      | `>=2.1.0, <4`  |
 | Quince            | `>=17.0, <18`      | `quince`      | `>=3.1.0, <4`  |
 | Redwood[^journal] | `>=18.0, <19`      | `main`        | `>=4`          |
+| Sumac             | `>=19.0, <20`      | `main`        | `>=4.1.0`      |
+
 
 [^v1]: For Open edX Maple and Tutor 13, you must run version 13.3.0 or later.
        That is because this plugin uses the Tutor v1 plugin API, [which was introduced with that release](https://github.com/overhangio/tutor/blob/master/CHANGELOG.md#v1320-2022-04-24).

setup.py

@@ -26,7 +26,7 @@ def load_readme():
     packages=find_packages(exclude=["tests*"]),
     include_package_data=True,
     python_requires=">=3.9",
-    install_requires=["tutor <19, >=16.0.0"],
+    install_requires=["tutor <20, >=16.0.0"],
     setup_requires=["setuptools-scm"],
     entry_points={
         "tutor.plugin.v1": [