update nanovg (#723)

* Update xmake.lua

* Update xmake.lua

packages/n/nanovg/xmake.lua

@@ -6,15 +6,24 @@ package("nanovg")
 
     add_urls("https://github.com/memononen/nanovg.git")
 
+    add_versions("2021.11.2", "e75cf72b4ad0b850a66e589d14d7b3156065dd2a")
+
     on_install("windows", "macosx", "linux", function (package)
         io.writefile("xmake.lua", [[
             add_rules("mode.debug", "mode.release")
             target("nanovg")
-                set_kind("static")
+                set_kind("$(kind)")
                 add_files("src/*.c")
                 add_headerfiles("src/(*.h)")
+                if is_plat("windows") and is_kind("shared") then
+                    add_rules("utils.symbols.export_all")
+                end
         ]])
-        import("package.tools.xmake").install(package)
+        local configs = {}
+        if package:config("shared") then
+            configs.kind = "shared"
+        end
+        import("package.tools.xmake").install(package, configs)
     end)
 
     on_test(function (package)