chore: add more Node/PG versions to CI (#174)

Author: benjie

.github/workflows/ci.yml

@@ -8,18 +8,18 @@ env:
   PGPASSWORD: postgres
   PGHOST: "127.0.0.1"
   PGPORT: 5432
-  TEST_ROOT_DATABASE_URL: postgres://postgres:postgres@localhost:5432/postgres
-  TEST_DATABASE_URL: postgres://someone:something@localhost:5432/graphile_migrate_test
+  TEST_ROOT_DATABASE_URL: postgres://postgres:postgres@127.0.0.1:5432/postgres
+  TEST_DATABASE_URL: postgres://someone:something@127.0.0.1:5432/graphile_migrate_test
   PGVERSION: 10
 
 jobs:
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
-        postgres-version: [10, 11, 12]
+        node-version: [10.x, 16.x, 18.x]
+        postgres-version: [10, 12, 15]
 
     services:
       postgres: