Merge pull request #1020 from julia-vscode/sp/clientcapailities-textDocument-violation

Fix ClientCapabilities.textDocument spec violation

Author: pfitzseb

src/requests/init.jl

@@ -1,5 +1,5 @@
 function ServerCapabilities(client::ClientCapabilities)
-    prepareSupport = !ismissing(client.textDocument.rename) && client.textDocument.rename.prepareSupport === true
+    prepareSupport = !ismissing(client.textDocument) && !ismissing(client.textDocument.rename) && client.textDocument.rename.prepareSupport === true
 
     ServerCapabilities(
     TextDocumentSyncOptions(true,