Merge pull request #11608 from Microsoft/vladima/port-11594

Ports #11594 into master

Author: vladima

src/server/session.ts

@@ -1590,7 +1590,8 @@ namespace ts.server {
                 return this.requiredResponse(this.getDocumentHighlights(request.arguments, /*simplifiedResult*/ false));
             },
             [CommandNames.CompilerOptionsForInferredProjects]: (request: protocol.SetCompilerOptionsForInferredProjectsRequest) => {
-                return this.requiredResponse(this.setCompilerOptionsForInferredProjects(request.arguments));
+                this.setCompilerOptionsForInferredProjects(request.arguments);
+                return this.requiredResponse(true);
             },
             [CommandNames.ProjectInfo]: (request: protocol.ProjectInfoRequest) => {
                 return this.requiredResponse(this.getProjectInfo(request.arguments));