Prevent Output panel from stealing focus

Fixes https://github.com/sbt/sbt/issues/4247
Ref https://github.com/Microsoft/vscode/issues/31474

vscode-sbt-scala/client/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "vscode-sbt-scala",
-  "version": "0.1.0",
+  "version": "0.2.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

vscode-sbt-scala/client/package.json

@@ -1,7 +1,7 @@
 {
   "name": "vscode-sbt-scala",
   "displayName": "Scala (sbt)",
-  "version": "0.2.0",
+  "version": "0.2.2",
   "author": "Lightbend, Inc.",
   "license": "BSD-3-Clause",
   "publisher": "lightbend",

vscode-sbt-scala/client/src/extension.ts

@@ -7,7 +7,13 @@ let fs = require('fs'),
 	os = require('os');
 import * as vscode from 'vscode';
 import { ExtensionContext, workspace } from 'vscode'; // workspace, 
-import { LanguageClient, LanguageClientOptions, ServerOptions, TransportKind } from 'vscode-languageclient';
+import {
+  LanguageClient,
+  LanguageClientOptions,
+  RevealOutputChannelOn,
+  ServerOptions,
+  TransportKind
+} from 'vscode-languageclient';
 
 let terminal: vscode.Terminal = null;
 
@@ -53,6 +59,7 @@ export async function activate(context: ExtensionContext) {
 	// Options to control the language client
 	let clientOptions: LanguageClientOptions = {
 		documentSelector: [{ language: 'scala', scheme: 'file' }, { language: 'java', scheme: 'file' }],
+		revealOutputChannelOn: RevealOutputChannelOn.Never,
 		initializationOptions: () => { 
 			return discoverToken();
 		}