move from 19.09 to 20.03

nixos/doc/manual/release-notes/rl-1909.xml

@@ -33,13 +33,6 @@
      PHP 7.1 is no longer supported due to upstream not supporting this version for the entire lifecycle of the 19.09 release.
     </para>
    </listitem>
-   <listitem>
-    <para>
-     Postgresql for NixOS service now defaults to v11. <literal>pkgs.postgresql</literal> is still 9.6, but
-     may be updated in future release. To prevent future update problems replace <literal>pkgs.postgresql</literal>
-     with an explicitly versioned <literal>pkgs.postgresql_9_6</literal>.
-    </para>
-   </listitem>
    <listitem>
      <para>
        The binfmt module is now easier to use. Additional systems can

nixos/doc/manual/release-notes/rl-2003.xml

@@ -23,6 +23,11 @@
      Support is planned until the end of October 2020, handing over to 20.09.
     </para>
    </listitem>
+   <listitem>
+    <para>
+     Postgresql for NixOS service now defaults to v11.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>
 

nixos/modules/services/databases/postgresql.nix

@@ -226,7 +226,7 @@ in
       # Note: when changing the default, make it conditional on
       # ‘system.stateVersion’ to maintain compatibility with existing
       # systems!
-      mkDefault (if versionAtLeast config.system.stateVersion "19.09" then pkgs.postgresql_11
+      mkDefault (if versionAtLeast config.system.stateVersion "20.03" then pkgs.postgresql_11
             else if versionAtLeast config.system.stateVersion "17.09" then pkgs.postgresql_9_6
             else if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql_9_5
             else throw "postgresql_9_4 was removed, please upgrade your postgresql version.");