message: feat: expand langserver module
  related
diff: @@ -178,13 +178,15 @@ export async function activate(context: ExtensionContext): Promise<void> {
  return;
  }
  let module = pyrightCfg.get<string>('server');
  - if (!module) {
  + if (module) {
  + module = workspace.expand(module);
  + } else {
  module = join(context.extensionPath, 'node_modules', 'pyright', 'langserver.index.js');
  + }
  if (!existsSync(module)) {
  - window.showMessage(`Pyright file doesn't exist, please reinstall coc-pyright`, 'error');
  + window.showMessage(`Pyright langserver doesn't exist, please reinstall coc-pyright`, 'error');
  return;
  }
  - }
  const serverOptions: NodeModule = {
  module,
  