CI: update matrix

.github/workflows/regression.yml

@@ -17,10 +17,10 @@ jobs:
 
     strategy:
       matrix:
-        pgver:  [ 9.5, 9.6, 10, 11, 12, 13, 14, 15 ]
+        pgver:  [ 9.5, 9.6, 10, 11, 12, 13, 14, 15, 16 ]
         include:
           - pgrepo: ""
-          - pgver: 16
+          - pgver: 17
             pgrepo: "-pgdg-snapshot"
 
     env:
@@ -36,7 +36,7 @@ jobs:
         sudo apt-get -y --purge --no-upgrade remove postgresql libpq-dev libpq5 postgresql-client-common postgresql-common
         curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
         sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" >/etc/apt/sources.list.d/pgdg.list'
-        sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg-snapshot main 16" >/etc/apt/sources.list.d/pgdg-snap.list'
+        sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg-snapshot main 17" >/etc/apt/sources.list.d/pgdg-snap.list'
         sudo apt-get update -qq
         sudo rm -rf /var/lib/postgresql