In version 1.13.5, we accidentally leaked a devDependency through a postinstall script. This has now been fixed in version 1.13.6. Sorry for the inconvenience.
underscorejs.org/#1.13.6
We just released Underscore version 1.13.5. There are no code changes, but we added a require.module exports condition. This helps to prevent duplicate copies of Underscore in Rollup- and WebPack-generated bundles.
#javascriptunderscorejs.org/#1.13.5