Bump com.google.guava:guava-gwt from 33.3.1-jre to 33.4.0-jre

Bumps [com.google.guava:guava-gwt](https://github.com/google/guava) from 33.3.1-jre to 33.4.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava-gwt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

com.grack.adventure.web/pom.xml

@@ -16,7 +16,7 @@
 		<dependency>
 			<groupId>com.google.guava</groupId>
 			<artifactId>guava-gwt</artifactId>
-			<version>33.3.1-jre</version>
+			<version>33.4.0-jre</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>