xeus-python use slim/splitted pyjs-rt (emscripten-forge#3991)

* xeus-python use slim/splitted pyjs-rt

* Update pyjs and pyjs-rt version constraints

Author: DerThorsten

recipes/recipes_emscripten/xeus-python/recipe.yaml

@@ -10,7 +10,7 @@ source:
   sha256: 32ad705962babacb1228fd3c1e4126cd48ff20d42806e8ba97e96f5440e24fca
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build:
@@ -27,13 +27,13 @@ requirements:
   - pybind11 >=2.6.1,<3.0
   - pybind11_json >=0.2.6,<0.3
   - xtl
-  - pyjs >=2,<3
+  - pyjs >=3.1,<4
   - zstd
   run:
   - python
   - ipython
   - xeus-python-shell >=0.6.0,<0.7
-  - pyjs >=2,<3
+  - pyjs-rt >=3.1,<4
   - ${{ pin_compatible('xeus', upper_bound='x.x') }}
 
 tests: