fix: gate negative_distance pgTap test on min_lib_version 5.0.0

Author: sakirr

pgtap/dijkstra/driving_distance/edge_cases/negative_distance.pg

@@ -5,13 +5,13 @@
 BEGIN;
 
 UPDATE edges SET cost = sign(cost), reverse_cost = sign(reverse_cost);
-SELECT CASE WHEN min_version('3.6.0') THEN plan(3) ELSE plan(1) END;
+SELECT CASE WHEN min_version('3.6.0') AND min_lib_version('5.0.0') THEN plan(3) ELSE plan(1) END;
 
 CREATE OR REPLACE FUNCTION test_function()
 RETURNS SETOF TEXT AS
 $BODY$
 BEGIN
-    IF min_version('3.6.0') THEN
+    IF min_version('3.6.0') AND min_lib_version('5.0.0') THEN
         -- Test negative distance throws error
         SELECT throws_ok(
             $$SELECT * FROM pgr_drivingDistance('SELECT id, source, target, cost FROM edges', 1, -1.0)$$,
@@ -34,7 +34,7 @@ BEGIN
             'SHOULD NOT THROW because distance is positive'
         );
     ELSE
-        SELECT skip(1, 'Function standardized on 3.6.0');
+        SELECT skip(1, 'Distance validation standardized on pgRouting 5.0.0');
     END IF;
 END;
 $BODY$