Update to allow building before 3.14 release

Author: mwshinn

.github/workflows/python-package.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9, '3.10', '3.11', '3.12', '3.13', '3.14']
+        python-version: [3.7, 3.8, 3.9, '3.10', '3.11', '3.12', '3.13', '3.14.0-rc.3']
         dep-versions: [numpy scipy pandas matplotlib]
 
     steps: