修改flyway对PostgreSQL较低版本号的校验

flyway-core/src/main/java/org/flywaydb/core/internal/database/postgresql/PostgreSQLDatabase.java

@@ -69,7 +69,7 @@ public class PostgreSQLDatabase extends Database<PostgreSQLConnection> {
     public final void ensureSupported() {
     public final void ensureSupported() {
         ensureDatabaseIsRecentEnough("9.0");
         ensureDatabaseIsRecentEnough("9.0");
 
 
-        ensureDatabaseNotOlderThanOtherwiseRecommendUpgradeToFlywayEdition("9.4", org.flywaydb.core.internal.license.Edition.ENTERPRISE);
+        ensureDatabaseNotOlderThanOtherwiseRecommendUpgradeToFlywayEdition("9.0", org.flywaydb.core.internal.license.Edition.ENTERPRISE);
 
 
         recommendFlywayUpgradeIfNecessaryForMajorVersion("12");
         recommendFlywayUpgradeIfNecessaryForMajorVersion("12");
     }
     }
@@ -162,4 +162,4 @@ public class PostgreSQLDatabase extends Database<PostgreSQLConnection> {
                 + " WHERE " + quote("installed_rank") + " > ?"
                 + " WHERE " + quote("installed_rank") + " > ?"
                 + " ORDER BY " + quote("installed_rank");
                 + " ORDER BY " + quote("installed_rank");
     }
     }
-}
+}
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