Bump org.owasp.esapi:esapi in /java/ql/test/utils/flowtestcasegenerator

Bumps [org.owasp.esapi:esapi](https://github.com/ESAPI/esapi-java-legacy) from 2.2.3.1 to 2.5.2.0.
- [Release notes](https://github.com/ESAPI/esapi-java-legacy/releases)
- [Changelog](https://github.com/ESAPI/esapi-java-legacy/blob/develop/documentation/esapi4java-core-2.0-readme-crypto-changes.html)
- [Commits](https://github.com/ESAPI/esapi-java-legacy/compare/esapi-2.2.3.1...esapi-2.5.2.0)

---
updated-dependencies:
- dependency-name: org.owasp.esapi:esapi
  dependency-type: direct:production
...

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

java/ql/test/utils/flowtestcasegenerator/pom.xml

@@ -82,7 +82,7 @@
     <dependency>
       <groupId>org.owasp.esapi</groupId>
       <artifactId>esapi</artifactId>
-      <version>2.2.3.1</version>
+      <version>2.5.2.0</version>
     </dependency>
     <dependency>
       <groupId>com.unboundid</groupId>