Handle expired tasks

Author: eculler

CONTRIBUTORS.rst

@@ -6,7 +6,6 @@ Maintainers
 
 EarthPy is maintained by a core group of Python enthusiasts at Earth Lab - University of Colorado, Boulder
 
-* Nathan Korinek (@nkorinek)
 * Elsa Culler (@eculler)
 
 Contributors
@@ -20,5 +19,5 @@ package.
 * Joseph McGlinchy (@joemcglinchy)
 * Jenny Palomino (@jlpalomino)
 * Max Joseph (@mbjoseph)
-* Joseph McGlinchy (@joemcglinchy)
-* Jenny Palomino (@jlpalomino)
+* Nathan Korinek (@nkorinek)
+* Elsa Culler (@eculler)