Use .use for streams

cleaner code

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip03Timestamp/ots/http/Request.kt

@@ -67,10 +67,10 @@ class Request(
                     "Content-Length",
                     "" + this.data!!.size.toString(),
                 )
-                val wr = DataOutputStream(httpURLConnection.getOutputStream())
-                wr.write(this.data, 0, this.data!!.size)
-                wr.flush()
-                wr.close()
+                DataOutputStream(httpURLConnection.getOutputStream()).use { wr ->
+                    wr.write(this.data, 0, this.data!!.size)
+                    wr.flush()
+                }
             } else {
                 httpURLConnection.setRequestMethod("GET")
             }

quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip03Timestamp/ots/http/Response.kt

@@ -23,6 +23,7 @@ package com.vitorpamplona.quartz.nip03Timestamp.ots.http
 import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.databind.json.JsonMapper
 import java.io.ByteArrayOutputStream
+import java.io.Closeable
 import java.io.IOException
 import java.io.InputStream
 import java.nio.charset.StandardCharsets
@@ -30,7 +31,7 @@ import java.nio.charset.StandardCharsets
 /**
  * Holds the response from an HTTP request.
  */
-class Response {
+class Response : Closeable {
     private var stream: InputStream? = null
 
     var fromUrl: String? = null
@@ -79,4 +80,9 @@ class Response {
                 JsonMapper.builder().build()
             return builder.readTree(jsonString)
         }
+
+    override fun close() {
+        stream?.close()
+        stream = null
+    }
 }