Update to Java 11

- Bump to 0.30.0-SNPASHOT, since updating to Java 11 breaks API
- Use `--release 11` in maven compiler plugin
- Use Java 11 in the Jenkinsfiles
- Update tycho to 2.7.5 (the newest version that supports Java 11)
- Update to the latest lsp4j, adapt to the API changes, and remove the
  guava exclusion (lsp4j no longer ships with guava, so we don't need to
  exclude it)

Signed-off-by: David Thompson <davthomp@redhat.com>

Author: datho7561

Jenkinsfile

@@ -1,7 +1,7 @@
 pipeline{
   agent any
   tools {
-    jdk 'adoptopenjdk-hotspot-jdk8-latest'
+    jdk 'adoptopenjdk-hotspot-jdk11-latest'
   }
   environment {
     MAVEN_HOME = "$WORKSPACE/.m2/"

Release.jenkins

@@ -1,7 +1,7 @@
 pipeline{
   agent any
   tools {
-    jdk 'adoptopenjdk-hotspot-jdk8-latest'
+    jdk 'adoptopenjdk-hotspot-jdk11-latest'
   }
   environment {
     MAVEN_HOME = "$WORKSPACE/.m2/"

org.eclipse.lemminx/pom.xml

@@ -3,7 +3,7 @@
 	<parent>
 		<groupId>org.eclipse.lemminx</groupId>
 		<artifactId>lemminx-parent</artifactId>
-		<version>0.29.1-SNAPSHOT</version>
+		<version>0.30.0-SNAPSHOT</version>
 	</parent>
 	<artifactId>org.eclipse.lemminx</artifactId>
 	<properties>
@@ -217,12 +217,6 @@
 		<dependency>
 			<groupId>org.eclipse.lsp4j</groupId>
 			<artifactId>org.eclipse.lsp4j</artifactId>
-			<exclusions>
-				<exclusion>
-					<groupId>com.google.guava</groupId>
-					<artifactId>guava</artifactId>
-				</exclusion>
-			</exclusions>
 		</dependency>
 		<dependency>
 			<groupId>org.eclipse.lsp4j</groupId>

org.eclipse.lemminx/src/test/java/org/eclipse/lemminx/services/extensions/WorkspaceServiceParticipantTest.java

@@ -51,7 +51,7 @@ public void initializeLanguageService() {
 
 	@Test
 	public void testWorkspaceFolders() {
-		DidChangeWorkspaceFoldersParams params = new DidChangeWorkspaceFoldersParams(new WorkspaceFoldersChangeEvent(Collections.singletonList(new WorkspaceFolder("added")), Collections.singletonList(new WorkspaceFolder("removed"))));
+		DidChangeWorkspaceFoldersParams params = new DidChangeWorkspaceFoldersParams(new WorkspaceFoldersChangeEvent(Collections.singletonList(new WorkspaceFolder("added", "added")), Collections.singletonList(new WorkspaceFolder("removed", "removed"))));
 		server.getWorkspaceService().didChangeWorkspaceFolders(params);
 		assertArrayEquals(new String[] { "added" }, workspaceServiceParticipant.didChangeWorkspaceFolders.getEvent().getAdded().stream().map(WorkspaceFolder::getUri).toArray(String[]::new));
 		assertArrayEquals(new String[] { "removed" }, workspaceServiceParticipant.didChangeWorkspaceFolders.getEvent().getRemoved().stream().map(WorkspaceFolder::getUri).toArray(String[]::new));

pom.xml

@@ -2,13 +2,13 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.eclipse.lemminx</groupId>
 	<artifactId>lemminx-parent</artifactId>
-	<version>0.29.1-SNAPSHOT</version>
+	<version>0.30.0-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<name>Eclipse LemMinX</name>
 	<description>LemMinX is a XML Language Server Protocol (LSP), and can be used with any editor that supports LSP, to offer an outstanding XML editing experience</description>
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<lsp4j.version>0.20.1</lsp4j.version>
+		<lsp4j.version>0.23.1</lsp4j.version>
 		<junit.version>5.10.1</junit.version>
 	</properties>
 	<url>https://github.com/eclipse/lemminx</url>
@@ -118,8 +118,7 @@
 					<artifactId>maven-compiler-plugin</artifactId>
 					<version>3.11.0</version>
 					<configuration>
-						<source>1.8</source>
-						<target>1.8</target>
+						<release>11</release>
 					</configuration>
 				</plugin>
 				<plugin>
@@ -248,7 +247,7 @@
 						<plugin>
 							<groupId>org.eclipse.tycho.extras</groupId>
 							<artifactId>tycho-eclipserun-plugin</artifactId>
-							<version>1.3.0</version>
+							<version>2.7.5</version>
 							<executions>
 								<execution>
 									<id>generate-p2-site</id>
@@ -257,7 +256,7 @@
 										<goal>eclipse-run</goal>
 									</goals>
 									<configuration>
-										<executionEnvironment>JavaSE-1.8</executionEnvironment>
+										<executionEnvironment>JavaSE-11</executionEnvironment>
 										<repositories>
 											<repository>
 												<id>eclipse-4.10</id>