Update dependency org.postgresql:postgresql to v42.6.0

Author: renovate[bot]

build.gradle.kts

@@ -313,7 +313,7 @@ configure(integrationTestProjects) {
         "testRuntimeOnly"("com.h2database:h2:1.4.200")
         "testRuntimeOnly"("mysql:mysql-connector-java:8.0.32")
         "testRuntimeOnly"("com.oracle.database.jdbc:ojdbc8-production:18.15.0.0")
-        "testRuntimeOnly"("org.postgresql:postgresql:42.5.4")
+        "testRuntimeOnly"("org.postgresql:postgresql:42.6.0")
         "testRuntimeOnly"("com.microsoft.sqlserver:mssql-jdbc:8.4.1.jre8")
         "testRuntimeOnly"("org.testcontainers:mysql")
         "testRuntimeOnly"("org.testcontainers:oracle-xe")