[gnome-builder] lsp: notify server of workspace/configuration support

[Christian Hergert <chergert src gnome org>]

commit 236687d09d29f979e45cd65abf63effa3c30784e
Author: Christian Hergert <chergert redhat com>
Date:   Thu Dec 5 12:08:30 2019 -0800

    lsp: notify server of workspace/configuration support
    
    Fixes #1089

 src/libide/lsp/ide-lsp-client.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/libide/lsp/ide-lsp-client.c b/src/libide/lsp/ide-lsp-client.c
index be5d9a940..1cbec0ca0 100644
--- a/src/libide/lsp/ide-lsp-client.c
+++ b/src/libide/lsp/ide-lsp-client.c
@@ -1120,7 +1120,11 @@ ide_lsp_client_start (IdeLspClient *self)
     "rootUri", JSONRPC_MESSAGE_PUT_STRING (root_uri),
     "rootPath", JSONRPC_MESSAGE_PUT_STRING (root_path),
     "trace", JSONRPC_MESSAGE_PUT_STRING (trace_string),
-    "capabilities", "{", "}"
+    "capabilities", "{",
+      "workspace", "{",
+        "configuration", JSONRPC_MESSAGE_PUT_BOOLEAN (TRUE),
+      "}",
+    "}"
   );
 
   /*