bump protocol version

Not all the way there yet, but working on the last few updates in other branches.

Author: simonpcouch

R/client.R

@@ -405,7 +405,7 @@ mcp_request_initialize <- function() {
     id = 1,
     method = "initialize",
     params = list(
-      protocolVersion = "2024-11-05",
+      protocolVersion = "2025-06-18",
       capabilities = list(
         tools = list(
           listChanged = FALSE

R/server.R

@@ -257,7 +257,7 @@ cat_json <- function(x) {
 
 capabilities <- function() {
   list(
-    protocolVersion = "2024-11-05",
+    protocolVersion = "2025-06-18",
     capabilities = list(
       # logging = named_list(),
       prompts = named_list(