add CI (#31)

Update build matrix to use 1.25.

Author: jba

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.23', '1.24', '1.25.0-rc.2' ]
+        go: [ '1.23', '1.24', '1.25' ]
     steps:
     - name: Check out code
       uses: actions/checkout@v4