Update dependency org.postgresql:postgresql to v42.2.19

Author: renovate-bot

games-server/build.gradle

@@ -64,7 +64,7 @@ dependencies {
     compile "io.javalin:javalin:2.8.0"
     compile "com.github.kittinunf.fuel:fuel:2.3.0"
     compile group: 'com.amazonaws', name: 'aws-java-sdk-dynamodb', version: '1.11.879'
-    compile group: 'org.postgresql', name: 'postgresql', version: '42.2.14'
+    compile group: 'org.postgresql', name: 'postgresql', version: '42.2.19'
     compile 'com.zaxxer:HikariCP:3.4.5'
     compile 'com.github.ben-manes.caffeine:caffeine:2.8.5'
     compile group: 'ai.djl', name: 'api', version: '0.3.0'