Merge pull request #12 from Jwoo5/issue_11

Fixed in-icu mortality task to exclude patients who die or are discharged from the ICU in the gap window.

src/MEDS-DEV/tasks/criteria/mortality/in_icu/first_24h.yaml

@@ -43,7 +43,7 @@ windows:
     end_inclusive: True
     has:
       icu_admission: (None, 0)
-      discharge_or_death: (0, None)
+      discharge_or_death: (None, 0)
   target:
     start: gap.end
     end: start -> discharge_or_death