/* plx 1.3.0 -> 1.3.1: no catalog changes.
 *
 * 1.3.1 is a code-only patch: memory-safety and robustness fixes in the shared
 * transpiler and string builder (loadable module $libdir/plx). No SQL objects
 * the extension defines change, so this update script only advances the recorded
 * version. Installing the matching $libdir/plx is what delivers the fixes. */