Bump com.itextpdf:itextpdf from 5.5.12 to 5.5.13.4

Bumps [com.itextpdf:itextpdf](https://github.com/itext/itextpdf) from 5.5.12 to 5.5.13.4.
- [Release notes](https://github.com/itext/itextpdf/releases)
- [Commits](itext/itextpdf@5.5.12...5.5.13.4)

---
updated-dependencies:
- dependency-name: com.itextpdf:itextpdf
  dependency-version: 5.5.13.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -344,7 +344,7 @@
       <dependency>
         <groupId>com.itextpdf</groupId>
         <artifactId>itextpdf</artifactId>
-        <version>5.5.12</version>
+        <version>5.5.13.4</version>
       </dependency>
       <dependency>
         <groupId>org.sonatype.nexus</groupId>