The components of hid are licensed as such:
hidapiis released under the 3-clause BSD license.libusbis released under the GNU LGPL 2.1license.go.hidis released under the 2-clause BSD license.gowcharis released under the 3-clause BSD license.
Given the above, hid is licensed under GNU LGPL 2.1 or later on Linux and 3-clause BSD on other platforms.