Upgrade to Postgresql 42.2.12

Closes gh-21202

Author: snicoll

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -167,7 +167,7 @@
 		<ojdbc.version>19.3.0.0</ojdbc.version>
 		<okhttp3.version>3.14.7</okhttp3.version>
 		<pooled-jms.version>1.0.6</pooled-jms.version>
-		<postgresql.version>42.2.11</postgresql.version>
+		<postgresql.version>42.2.12</postgresql.version>
 		<prometheus-pushgateway.version>0.7.0</prometheus-pushgateway.version>
 		<quartz.version>2.3.2</quartz.version>
 		<querydsl.version>4.2.2</querydsl.version>