[releng] Move to Tycho 2.7.3
diff --git a/releng/pom.xml b/releng/pom.xml
index f075e64..186fba1 100644
--- a/releng/pom.xml
+++ b/releng/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-   Copyright (c) 2014, 2021 1C-Soft LLC and others.
+   Copyright (c) 2014, 2022 1C-Soft LLC and others.
 
    This program and the accompanying materials are made available under
    the terms of the Eclipse Public License 2.0 which is available at
@@ -23,8 +23,8 @@
     <maven>3.8.2</maven>
   </prerequisites>
   <properties>
-    <tycho.version>2.5.0</tycho.version>
-    <tycho.extras.version>2.5.0</tycho.extras.version>
+    <tycho.version>2.7.3</tycho.version>
+    <tycho.extras.version>2.7.3</tycho.extras.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <maven.build.timestamp.format>yyyyMMdd-HHmm</maven.build.timestamp.format>