use utils extractZip instead of lib directly

lib/cmds/template_generator.js

@@ -15,9 +15,8 @@ class TemplateGenerator {
     fs.mkdirpSync(utils.dirname(tmpFilePath));
     utils.downloadFile(url, tmpFilePath, () => {
       let fspath = utils.joinPath(destinationFolder, name);
-      const decompress = require('decompress');
 
-      decompress(tmpFilePath, fspath, {
+      utils.extractZip(tmpFilePath, fspath, {
         map: file => {
           let fixed_path = file.path.split('/');
           fixed_path.shift(); // remove first directory