fix(client): add new name for method-capability map (#277)

Author: ulisses-cruz

lua/null-ls/client.lua

@@ -76,6 +76,7 @@ local on_init = function(new_client, initialize_result)
         -- TODO: extract map to prevent future issues
         local method_to_required_capability_map = lsp.protocol._request_name_to_capability
             or lsp._request_name_to_capability
+            or lsp.protocol._request_name_to_server_capability
         local required_capability = method_to_required_capability_map[method]
         return not required_capability
             or vim.tbl_get(new_client.server_capabilities, unpack(required_capability)) == false