Close joaotavora/eglot#39: Handle experimental/unknown server methods…

… gracefully

* eglot.el (eglot-handle-notification t t, eglot-handle-request t
t): Add default handlers for unknown methods.
(eglot-handle-notification $cquery/progress)
(eglot-handle-notification $cquery/setInactiveRegions)
(eglot-handle-notification $cquery/publishSemanticHighlighting):
Remove these no-ops.

eglot.el

@@ -856,6 +856,16 @@ Uses THING, FACE, DEFS and PREPEND."
 
 ;;; Protocol implementation (Requests, notifications, etc)
 ;;;
+(cl-defmethod eglot-handle-notification
+  (_server method &key)
+  "Handle unknown notification"
+  (eglot--warn "Server sent unknown notification method `%s'" method))
+
+(cl-defmethod eglot-handle-request
+  (_server method &key)
+  "Handle unknown request"
+  (jsonrpc-error "Unknown request method `%s'" method))
+
 (cl-defmethod eglot-handle-notification
   (_server (_method (eql window/showMessage)) &key type message)
   "Handle notification window/showMessage"
@@ -1582,21 +1592,6 @@ If SKIP-SIGNATURE, don't try to send textDocument/signatureHelp."
     (list :cacheDirectory (file-name-as-directory cache)
           :progressReportFrequencyMs -1)))
 
-(cl-defmethod eglot-handle-notification
-  ((_server eglot-cquery) (_method (eql $cquery/progress))
-   &rest counts &key _activeThreads &allow-other-keys)
-  "No-op for noisy $cquery/progress extension")
-
-(cl-defmethod eglot-handle-notification
-  ((_server eglot-cquery) (_method (eql $cquery/setInactiveRegions))
-   &key _uri _inactiveRegions &allow-other-keys)
-  "No-op for unsupported $cquery/setInactiveRegions extension")
-
-(cl-defmethod eglot-handle-notification
-  ((_server eglot-cquery) (_method (eql $cquery/publishSemanticHighlighting))
-   &key _uri _symbols &allow-other-keys)
-  "No-op for unsupported $cquery/publishSemanticHighlighting extension")
-
 
 ;; FIXME: A horrible hack of Flymake's insufficient API that must go
 ;; into Emacs master, or better, 26.2