Update Tycho tooling

.mvn/extensions.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <extensions>
   <extension>
-    <groupId>org.eclipse.tycho.extras</groupId>
-    <artifactId>tycho-pomless</artifactId>
-    <version>2.7.0</version>
+    <groupId>org.eclipse.tycho</groupId>
+    <artifactId>tycho-build</artifactId>
+    <version>3.0.5</version>
   </extension>
 </extensions>

pom.xml

@@ -15,8 +15,10 @@
 		<module>eclipse-solargraph-updatesite</module>
 	</modules>
 	<properties>
+		<javase.version>JavaSE-11</javase.version>
+		<java.version>11</java.version>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<tycho.version>2.7.0</tycho.version>
+		<tycho.version>3.0.5</tycho.version>
 	</properties>
 	<build>
 		<plugins>
@@ -31,7 +33,7 @@
 				<artifactId>target-platform-configuration</artifactId>
 				<version>${tycho.version}</version>
 				<configuration>
-					<includePackedArtifacts>true</includePackedArtifacts>
+					<executionEnvironment>${javase.version}</executionEnvironment>
 					<target>
 						<artifact>
 							<groupId>io.github.pyvesb.eclipse_solargraph</groupId>