Switch from deprecated outDir to outFiles

This commit updates task configuration to use current
configuration keys and to limit number of warnings displayed in
VSCode itself.

Similar one:
microsoft/vscode-generator-code#59

Thanks!

Author: peterblazejewicz

.vscode/launch.json

@@ -11,7 +11,9 @@
             ],
             "stopOnEntry": false,
             "sourceMaps": true,
-            "outDir": "${workspaceRoot}/out/src"
+            "outFiles": [
+                "${workspaceRoot}/out/src/**/*.js"
+            ]
         },
         {
             "name": "Launch Tests",
@@ -21,7 +23,9 @@
             "args": ["--extensionDevelopmentPath=${workspaceRoot}", "--extensionTestsPath=${workspaceRoot}/out/test" ],
             "stopOnEntry": false,
             "sourceMaps": true,
-            "outDir": "${workspaceRoot}/out/test"
+            "outFiles": [
+                "${workspaceRoot}/out/test/**/*.js"
+            ]
         }
     ]
 }