Bump org.postgresql:postgresql from 42.6.0 to 42.7.2.

[#637]

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -43,7 +43,7 @@
         <logback.version>1.3.14</logback.version>
         <mockito.version>4.11.0</mockito.version>
         <netty.version>4.1.104.Final</netty.version>
-        <postgresql.version>42.6.0</postgresql.version>
+        <postgresql.version>42.7.2</postgresql.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <r2dbc-spi.version>1.0.0.RELEASE</r2dbc-spi.version>