message: [go] support skipDownload flag
diff: @@ -125,7 +125,7 @@ Learn more: https://github.com/golang/go/wiki/Modules
  const forceMove = Boolean(meta.isDev);
  const srcPath = join(goPath, 'src', 'lambda');
  - let downloadPath = meta.isDev ? workPath : srcPath;
  + let downloadPath = (meta.isDev || meta.skipDownload) ? workPath : srcPath;
  let downloadedFiles = await download(files, downloadPath, meta);
  debug(`Parsing AST for "${entrypoint}"`);
  