Use numpy<2.0 in minimum test

.github/workflows/test.yml

@@ -55,6 +55,7 @@ jobs:
       run: |
         pip install "audeer==2.0.0"
         pip install "audiofile==0.4.0"
+        pip install "numpy<2.0"
         pip install "pandas==1.4.1"
         pip install "pyarrow==10.0.1"
         pip install "pyyaml==5.4.1"