Upgrade IDE dependencies

Author: smarter

language-server/src/dotty/tools/languageserver/DottyLanguageServer.scala

@@ -381,7 +381,7 @@ class DottyLanguageServer extends LanguageServer
     val uriTrees = driver.openedTrees(uri)
 
     val defs = Interactive.namedTrees(uriTrees, includeReferences = false, _ => true)
-    defs.map(d => symbolInfo(d.tree.symbol, d.namePos)).asJava
+    defs.map(d => JEither.forLeft(symbolInfo(d.tree.symbol, d.namePos))).asJava
   }
 
   override def symbol(params: WorkspaceSymbolParams) = computeAsync { cancelToken =>

project/Build.scala

@@ -822,7 +822,7 @@ object Build {
       fork in run := true,
       fork in Test := true,
       libraryDependencies ++= Seq(
-        "org.eclipse.lsp4j" % "org.eclipse.lsp4j" % "0.4.1",
+        "org.eclipse.lsp4j" % "org.eclipse.lsp4j" % "0.5.0.M1",
         Dependencies.`jackson-databind`
       ),
       javaOptions := (javaOptions in `dotty-compiler-bootstrapped`).value,