Fix parsing of glTF version

Handle version as int in gltf
Fix format specifiers in glTF version parser

code/glTF2Importer.cpp

@@ -111,7 +111,8 @@ bool glTF2Importer::CanRead(const std::string& pFile, IOSystem* pIOHandler, bool
         glTF2::Asset asset(pIOHandler);
         try {
             asset.Load(pFile, extension == "glb");
-            return asset.asset.version >= 2;
+            std::string version = asset.asset.version;
+            return !version.empty() && version[0] == '2';
         } catch (...) {
             return false;
         }