message: Fix console warning
  fixes
diff: @@ -149,7 +149,7 @@ class Configuration implements IConfiguration {
  getConfiguration(section: string = ''): vscode.WorkspaceConfiguration {
  const activeTextEditor = vscode.window.activeTextEditor;
  - const resource = activeTextEditor ? activeTextEditor.document.uri : undefined;
  + const resource = activeTextEditor ? activeTextEditor.document.uri : null;
  return vscode.workspace.getConfiguration(section, resource);
  }
  