message: initialize: Add offsetEncoding to InitializeResult
diff: @@ -226,9 +226,10 @@ struct InitializeResult {
  const char *name = "ccls";
  const char *version = CCLS_VERSION;
  } serverInfo;
  + const char *offsetEncoding = "utf-32";
  };
  REFLECT_STRUCT(InitializeResult::ServerInfo, name, version);
  -REFLECT_STRUCT(InitializeResult, capabilities, serverInfo);
  +REFLECT_STRUCT(InitializeResult, capabilities, serverInfo, offsetEncoding);
  struct FileSystemWatcher {
  std::string globPattern = "**/*";
  