Bump the maven group across 2 directories with 2 updates (#641)

Bumps the maven group with 2 updates in the / directory: [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) and [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc).
Bumps the maven group with 2 updates in the /wren-main directory: [com.google.protobuf:protobuf-java](https://github.com/protocolbuffers/protobuf) and [org.postgresql:postgresql](https://github.com/pgjdbc/pgjdbc).


Updates `com.google.protobuf:protobuf-java` from 3.19.4 to 3.19.6
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.19.4...v3.19.6)

Updates `org.postgresql:postgresql` from 42.3.9 to 42.7.3
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.3.9...REL42.7.3)

Updates `com.google.protobuf:protobuf-java` from 3.19.4 to 3.19.6
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v3.19.4...v3.19.6)

Updates `org.postgresql:postgresql` from 42.3.9 to 42.7.3
- [Release notes](https://github.com/pgjdbc/pgjdbc/releases)
- [Changelog](https://github.com/pgjdbc/pgjdbc/blob/master/CHANGELOG.md)
- [Commits](pgjdbc/pgjdbc@REL42.3.9...REL42.7.3)

---
updated-dependencies:
- dependency-name: com.google.protobuf:protobuf-java
  dependency-type: direct:production
  dependency-group: maven
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
  dependency-group: maven
- dependency-name: com.google.protobuf:protobuf-java
  dependency-type: direct:production
  dependency-group: maven
- dependency-name: org.postgresql:postgresql
  dependency-type: direct:production
  dependency-group: maven
...

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

pom.xml

@@ -156,7 +156,7 @@
             <dependency>
                 <groupId>com.google.protobuf</groupId>
                 <artifactId>protobuf-java</artifactId>
-                <version>3.19.4</version>
+                <version>3.19.6</version>
             </dependency>
 
             <dependency>
@@ -367,7 +367,7 @@
             <dependency>
                 <groupId>org.postgresql</groupId>
                 <artifactId>postgresql</artifactId>
-                <version>42.3.9</version>
+                <version>42.7.3</version>
             </dependency>
 
             <dependency>