Bump com.google.errorprone:error_prone_annotations from 2.18.0 to 2.2…

…1.1 (#636)

Bumps [com.google.errorprone:error_prone_annotations](https://github.com/google/error-prone) from 2.18.0 to 2.21.1.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.18.0...v2.21.1)

---
updated-dependencies:
- dependency-name: com.google.errorprone:error_prone_annotations
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

wicket-guice/pom.xml

@@ -39,7 +39,7 @@
 			<dependency>
 				<groupId>com.google.errorprone</groupId>
 				<artifactId>error_prone_annotations</artifactId>
-				<version>2.18.0</version>
+				<version>2.21.1</version>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>

wicket-migration/pom.xml

@@ -18,7 +18,7 @@
             <dependency>
                 <groupId>com.google.errorprone</groupId>
                 <artifactId>error_prone_annotations</artifactId>
-                <version>2.18.0</version>
+                <version>2.21.1</version>
                 <scope>test</scope>
             </dependency>
             <dependency>