Update github actions

Author: stephenafamo

.github/workflows/test.yaml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        go: [1.19, 1.18]
+        go: ['oldstable', 'stable']
     services:
       postgres:
         image: postgres:12