Bump unboundid-ldapsdk from 5.1.3 to 5.1.4 in /core

Bumps [unboundid-ldapsdk](https://github.com/pingidentity/ldapsdk) from 5.1.3 to 5.1.4.
- [Release notes](https://github.com/pingidentity/ldapsdk/releases)
- [Changelog](https://github.com/pingidentity/ldapsdk/blob/master/docs/release-notes.html)
- [Commits](https://github.com/pingidentity/ldapsdk/compare/5.1.3...5.1.4)

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

Closes #167

Change-Id: I82b33a7da5c7fcf1919a0b65e2cf4023d94d2b90
diff --git a/core/pom.xml b/core/pom.xml
index aa24a24..868ea91 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -459,7 +459,7 @@
 		<dependency>
 			<groupId>com.unboundid</groupId>
 			<artifactId>unboundid-ldapsdk</artifactId>
-			<version>5.1.3</version>
+			<version>5.1.4</version>
 		</dependency>
 
 		<!-- not part of public release <dependency> <groupId>KorAP-graphDB</groupId>