fix NOMINMAX for windows

Author: Gogoshika-ga

source/gameanalytics/GAUtilities.h

@@ -74,7 +74,7 @@ namespace gameanalytics
 
         inline std::string trimString(std::string const& str, std::size_t size)
         {
-            return str.substr(0, (std::min)(size, str.size()));
+            return str.substr(0, std::min(size, str.size()));
         }
 
         inline json parseFields(std::string const& fields)

source/gameanalytics/Http/GAHttpCurl.h

@@ -1,5 +1,19 @@
 #pragma once
 
+#ifdef _WIN32
+
+    #ifndef WIN32_LEAN_AND_MEAN
+        #define WIN32_LEAN_AND_MEAN
+    #endif
+
+    #ifndef NOMINMAX
+        #define NOMINMAX
+    #endif
+
+    #include <windows.h>
+
+#endif
+
 #include "GameAnalytics/GAHttpClient.h"
 #include <curl/curl.h>