Add support for using Python 3.13 (#161)

* Document using Python 3.13

Also remove the hard pin on the emscripten-abi, allowing to use the new
channel

* Fix link

* Update Playwright Snapshots

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

docs/environment.md

@@ -56,6 +56,22 @@ Then those packages are usable directly:
    plt.show();
 ```
 
+### Python 3.13 support
+
+If you specify the emscripten-forge mirror published on [prefix.dev](https://prefix.dev), you will be able to use Python 3.13 in your deployment.
+
+⚠ This is still a work-in-progress feature and some packages may be missing ⚠
+
+```yaml
+name: xeus-python-kernel
+channels:
+  - https://repo.prefix.dev/emscripten-forge-dev
+  - conda-forge
+dependencies:
+  - xeus-python
+  - numpy
+```
+
 ### pip packages
 
 ⚠ This feature is experimental. You won't have the same user-experience as when using conda/mamba in a "normal" setup ⚠

jupyterlite_xeus/create_conda_env.py

@@ -49,8 +49,6 @@ def create_conda_env_from_env_file(root_prefix, env_file_content, env_file_locat
 
     # get the specs
     specs, pip_dependencies = _extract_specs(env_file_location, env_file_content)
-    # Force emscripten version
-    specs.append("emscripten-abi=3.1.45")
 
     create_conda_env_from_specs(
         env_name=env_name,