update libhv to 1.3.1 (#2117)

packages/l/libhv/xmake.lua

@@ -13,6 +13,7 @@ package("libhv")
     add_versions("1.2.4", "389fa60f0d6697b5267ddc69de00e4844f1d8ac8ee4d2ad3742850589c20d46e")
     add_versions("1.2.6", "dd5ed854f5cdc0bdd3a3310a9f0452ec194e2907006551aebbb603825a989ed1")
     add_versions("1.3.0", "e7a129dcabb541baeb8599e419380df6aa98afc6e04874ac88a6d2bdb5a973a5")
+    add_versions("1.3.1", "66fb17738bc51bee424b6ddb1e3b648091fafa80c8da6d75626d12b4188e0bdc")
 
     add_configs("protocol",    {description = "compile protocol", default = false, type = "boolean"})
     add_configs("http",        {description = "compile http", default = true, type = "boolean"})