Upgrade Tycho to Latest release (3.0.5)

Part of #34

releng/org.eclipse.epp.config/parent/pom.xml

@@ -24,8 +24,7 @@
 
   <properties>
     <maven.version>3.6.3</maven.version>
-    <!-- Due to Bug 580592 we are currently stuck with older version of Tycho -->
-    <tycho.version>2.7.1</tycho.version>
+    <tycho.version>3.0.5</tycho.version>
     <tycho.scmUrl>scm:git:git://git.eclipse.org/gitroot/epp/org.eclipse.epp.packages.git</tycho.scmUrl>
     <cbi.version>1.3.2</cbi.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -153,7 +152,7 @@
         <artifactId>tycho-packaging-plugin</artifactId>
         <dependencies>
           <dependency>
-            <groupId>org.eclipse.tycho.extras</groupId>
+            <groupId>org.eclipse.tycho</groupId>
             <artifactId>tycho-buildtimestamp-jgit</artifactId>
             <version>${tycho.version}</version>
           </dependency>