postgresql.driver.version upgrade to 42.2.20 to fix connection issue with Postgres 11

@@ -94,7 +94,7 @@
         <hsqldb.version>2.5.0</hsqldb.version>
         <dbunit.version>2.5.3</dbunit.version>
         <spring-test-dbunit.version>1.2.1</spring-test-dbunit.version>
-        <postgresql.driver.version>42.2.16</postgresql.driver.version>
+        <postgresql.driver.version>42.2.20</postgresql.driver.version>
         <sonar.exclusions>org/thingsboard/server/gen/**/*,
             org/thingsboard/server/extensions/core/plugin/telemetry/gen/**/*
         </sonar.exclusions>