LibJS: Hook up the 'v' (unicodeSets) RegExp flag

Author: https://github.com/alimpfard
Commit: f4b26b0cea
Pull-request: https://github.com/SerenityOS/serenity/pull/14592
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Runtime/CommonPropertyNames.h

@@ -526,11 +526,12 @@ namespace JS {
     P(undefined)                             \
     P(unescape)                              \
     P(unicode)                               \
+    P(unicodeSets)                           \
     P(unit)                                  \
     P(unitDisplay)                           \
-    P(until)                                 \
     P(unregister)                            \
     P(unshift)                               \
+    P(until)                                 \
     P(usage)                                 \
     P(useGrouping)                           \
     P(value)                                 \