pbxProject: pbxCopyFilesBuildPhaseObj missing 'frameworks'

Previously there was no way to access SUBFOLDERSPEC_BY_DESTINATION.frameworks
diff --git a/lib/pbxProject.js b/lib/pbxProject.js
index da05245..829b43e 100644
--- a/lib/pbxProject.js
+++ b/lib/pbxProject.js
@@ -1447,6 +1447,7 @@
         command_line_tool: 'wrapper',
         dynamic_library: 'products_directory',
         framework: 'shared_frameworks',
+        frameworks: 'frameworks',
         static_library: 'products_directory',
         unit_test_bundle: 'wrapper',
         watch_app: 'wrapper',