Build eventpp for emscripten-4x (#3259)

Co-authored-by: emscripten-forge-bot <[email protected]>

Author: emscripten-forge-bot

recipes/recipes_emscripten/eventpp/recipe.yaml

@@ -11,7 +11,7 @@ source:
   sha256: d87aba67223fd9aced2ba55eb82bd534007e43e1b919106a53fcd3070fa125ea
 
 build:
-  number: 0
+  number: 1
 
 requirements:
   build: