fix ci

Author: dsherret

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        os: [macOS-latest, ubuntu-latest, windows-2019]
+        os: [macOS-latest, ubuntu-latest, windows-latest]
     defaults:
       run:
         shell: bash