Update to tycho 5.0.0

Tycho 5.0.0 is required when using JavaSE-21

Author: travkin79

.mvn/maven.config

@@ -1 +1 @@
--Dtycho-version=3.0.5
+-Dtycho-version=5.0.0

plantuml4eclipse/releng/net.sourceforge.plantuml.parent/pom.xml

@@ -13,7 +13,7 @@
 
 		<!-- tycho-version variable is defined in repo-root-folder/.mvn/maven.config, see https://tycho.eclipseprojects.io/doc/latest/StructuredBuild.html,
 		     in addition, we specify it here to avoid IDE warnings because of an unrecognized variable definition -->
-		<tycho-version>3.0.5</tycho-version>
+		<tycho-version>5.0.0</tycho-version>
 		<!-- <xtextVersion>2.9.1</xtextVersion> <xtend-maven-plugin-version>2.9.1</xtend-maven-plugin-version> -->
 		<skip-ui-tests>true</skip-ui-tests>
 	</properties>