added tests to allow bot / agent merge PR on its own to reduce maintainance costs (emscripten-forge#2290)

Author: DerThorsten

recipes/recipes_emscripten/arrow-cpp/recipe.yaml

@@ -1,13 +1,13 @@
 context:
-  version: 19.0.1
+  version: 20.0.0
 
 package:
   name: arrow-cpp
   version: ${{ version }}
 
 source:
 - url: https://github.com/apache/arrow/releases/download/apache-arrow-${{version}}/apache-arrow-${{version}}.tar.gz
-  sha256: acb76266e8b0c2fbb7eb15d542fbb462a73b3fd1e32b80fad6c2fafd95a51160
+  sha256: 89efbbf852f5a1f79e9c99ab4c217e2eb7f991837c005cba2d4a2fbd35fad212
 
 build:
   number: 1
@@ -25,6 +25,17 @@ requirements:
   - rapidjson
   - nlohmann_json
 
+
+tests:
+  - package_contents:
+      lib:
+      - libarrow.a
+      - libarrow_acero.a
+      - libarrow_bundled_dependencies.a
+      - libarrow_dataset.a
+      include:
+      - arrow/array.h
+    
 about:
   license: Apache-2.0
   summary: 'Arrow: A cross-language development platform for in-memory analytics'