MAINT: ignoring IERS warnings for now to pass tests on old python whe…

…re there are no more updates

setup.cfg

@@ -17,6 +17,10 @@ filterwarnings =
 # Numpy 2.0 deprecations triggered by upstream libraries.
 # Exact warning messages differ, thus using a super generic filter.
     ignore:numpy.core:DeprecationWarning
+# Added for python 3.8, cleanup once old python version support is removed
+# (adding it to conftest is ineffective as the PrototypeWarning line above already
+# triggers this warning at the time of collection
+    ignore::astropy.utils.iers.iers.IERSStaleWarning
 # We need to ignore this module level warning to not cause issues at collection time.
 # Remove it once warning is removed from code (in 1.7).
     ignore:pyvo.discover:pyvo.utils.prototype.PrototypeWarning