tar: include scoped packages in bundledDeps

PR-URL: npm/npm#13438
Fixes: npm/npm#8614
Credit: @forivall
Reviewed-By: @iarna
Reviewed-By: @zkat

lib/utils/tar.js

@@ -117,7 +117,17 @@ BundledPacker.prototype.applyIgnores = function (entry, partial, entryObj) {
   // if they're not already present at a higher level.
   if (this.bundleMagic) {
     // bubbling up.  stop here and allow anything the bundled pkg allows
-    if (entry.indexOf('/') !== -1) return true
+    if (entry.charAt(0) === '@') {
+      var firstSlash = entry.indexOf('/')
+      // continue to list the packages in this scope
+      if (firstSlash === -1) return true
+
+      // bubbling up.  stop here and allow anything the bundled pkg allows
+      if (entry.indexOf('/', firstSlash + 1) !== -1) return true
+    // bubbling up.  stop here and allow anything the bundled pkg allows
+    } else if (entry.indexOf('/') !== -1) {
+      return true
+    }
 
     // never include the .bin.  It's typically full of platform-specific
     // stuff like symlinks and .cmd files anyway.