Bump vaadin-server from 8.12.4 to 8.14.1 in /AdvancedTokenField-addon

Bumps [vaadin-server](https://github.com/vaadin/framework) from 8.12.4 to 8.14.1.
- [Release notes](https://github.com/vaadin/framework/releases)
- [Commits](vaadin/framework@8.12.4...8.14.1)

---
updated-dependencies:
- dependency-name: com.vaadin:vaadin-server
  dependency-type: direct:production
...

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

Author: dependabot[bot]

AdvancedTokenField-addon/pom.xml

@@ -22,7 +22,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<maven.compiler.source>1.8</maven.compiler.source>
 		<maven.compiler.target>1.8</maven.compiler.target>
-		<vaadin.version>8.12.4</vaadin.version>
+		<vaadin.version>8.14.1</vaadin.version>
 		<vaadin.plugin.version>8.6.2</vaadin.plugin.version>
 		<!-- ZIP Manifest fields -->
 		<Implementation-Version>${project.version}</Implementation-Version>