FIX: Avoid importing test feature during test collection

Author: effigies

nibabel/__future__/tests/conftest.py

@@ -0,0 +1,9 @@
+import pytest
+from packaging.version import Version
+
+if Version(pytest.__version__) >= Version("7"):
+    def pytest_ignore_collect(collection_path):
+        return collection_path.name == "example_feature.py"
+else:
+    def pytest_ignore_collect(path):
+        return path.basename == "example_feature.py"