Add meson-python requirement

Author: IsabelParedes

recipes/recipes_emscripten/cysignals/recipe.yaml

@@ -11,7 +11,7 @@ source:
   sha256: 4aefa3b35eb036cb40b2b948df84725976b987895338204f64550e2d63891f5f
 
 build:
-  script: $PYTHON -m pip install . -vv
+  script: ${{ PYTHON }} -m pip install . ${{ PIP_ARGS }}
   number: 0
 
 requirements:
@@ -21,6 +21,7 @@ requirements:
   - cross-python_${{ target_platform }}
   - python
   - pip
+  - meson-python
   host:
   - python
   run:
@@ -58,4 +59,4 @@ about:
 
 extra:
   recipe-maintainers:
-  - copilot
+  - copilot