dependency: Update dependency org.postgresql:postgresql to v42.7.9 (#74)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

buildSrc/src/main/kotlin/Versions.kt

@@ -18,7 +18,7 @@ object Versions {
     const val PLACEHOLDER_API = "2.11.7"
 
     const val MARIA_DB = "3.5.7"
-    const val POSTGRESQL = "42.7.5"
+    const val POSTGRESQL = "42.7.9"
     const val H2 = "2.4.240"
     const val ORMLITE = "6.1"
     const val HIKARI_CP = "7.0.2"