fix: TravisCI failures & status (#1970)

* fix: TravisCI failures & status
* Allow failure on s390x

test/test_emscripten.py

@@ -6,7 +6,7 @@ import textwrap
 
 import pytest
 
-from cibuildwheel.util import CIBW_CACHE_PATH
+from cibuildwheel.util import CIBW_CACHE_PATH, CIProvider, detect_ci_provider
 
 from . import test_projects, utils
 
@@ -49,6 +49,9 @@ def test_pyodide_build(tmp_path, use_pyproject_toml):
     if not shutil.which("python3.12"):
         pytest.skip("Python 3.12 not installed")
 
+    if detect_ci_provider() == CIProvider.travis_ci:
+        pytest.skip("Python 3.12 is just a non-working pyenv shim")
+
     if use_pyproject_toml:
         basic_project.files["pyproject.toml"] = textwrap.dedent(
             """