Add support for bumping maven-target locations

Currently the update-target mojo only support IU locations to be
updated.

This adds support to update maven-target locations as well, that becomes
very popular and widely used recently.

tycho-its/projects/tycho-version-bump-plugin/update-target/update-target.target

@@ -2,15 +2,22 @@
 <?pde version="3.6"?>
 <target name="update-target-bug" sequenceNumber="1">
 	<locations>
-		<location includeAllPlatforms="false" includeMode="slicer"
-			includeSource="true" type="InstallableUnit">
-			<unit id="org.eclipse.equinox.executable.feature.group"
-				version="0.0.0" />
-			<unit id="org.eclipse.jdt.feature.group" version="0.0.0" />
-			<unit id="org.eclipse.platform.ide" version="0.0.0" />
-			<unit id="org.eclipse.pde.feature.group" version="0.0.0" />
-			<repository
-				location="https://download.eclipse.org/eclipse/updates/4.17/" />
+		<location includeAllPlatforms="false" includeMode="slicer" includeSource="true" type="InstallableUnit">
+			<unit id="org.eclipse.equinox.executable.feature.group" version="0.0.0"/>
+			<unit id="org.eclipse.jdt.feature.group" version="0.0.0"/>
+			<unit id="org.eclipse.platform.ide" version="0.0.0"/>
+			<unit id="org.eclipse.pde.feature.group" version="0.0.0"/>
+			<repository location="https://download.eclipse.org/eclipse/updates/4.17/"/>
+		</location>
+		<location includeDependencyDepth="none" includeSource="true" missingManifest="generate" type="Maven">
+			<dependencies>
+				<dependency>
+					<groupId>javax.annotation</groupId>
+					<artifactId>javax.annotation-api</artifactId>
+					<version>1.2</version>
+					<type>jar</type>
+				</dependency>
+			</dependencies>
 		</location>
 	</locations>
-</target>
+</target>