fix: dotnet

Author: loks0n

templates/kotlin/src/main/kotlin/io/appwrite/extensions/JsonExtensions.kt.twig

@@ -1,9 +1,14 @@
 package {{ sdk.namespace | caseDot }}.extensions
 
 import com.google.gson.Gson
-
-val gson = Gson()
-
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import {{ sdk.namespace | caseDot }}.json.PreciseNumberAdapter
+
+val gson = GsonBuilder().registerTypeAdapter(
+    object : TypeToken<Map<String, Any>>(){}.type,
+    PreciseNumberAdapter()
+).create()
 fun Any.toJson(): String =
     gson.toJson(this)