install gulp to process code

node_modules/liftoff/lib/needs_lookup.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var isPlainObject = require('is-plain-object').isPlainObject;
+
+function needsLookup(xtends) {
+  if (typeof xtends === 'string' && xtends[0] === '.') {
+    return true;
+  }
+
+  if (isPlainObject(xtends)) {
+    // Objects always need lookup because they can't be used with `require()`
+    return true;
+  }
+
+  return false;
+}
+
+module.exports = needsLookup;