Updated driver for rtl88x2bu wifi adaptors based on RTL88x2BU_WiFi_linux_v5.2.4.1_22719_COEX20170518-4444.20170613.
Build confirmed on kernels up to 4.16.0.
See http://www.wolfteck.com/2018/02/22/wsky_1200mbps_wireless_usb_wifi_adapter/ for all the hows and whys around the updates.