Add additional examples to cover supported request methods

examples/delete.php

@@ -0,0 +1,25 @@
+<?php
+require __DIR__ . '/vendor/autoload.php';
+
+use \Curl\Curl;
+
+// curl --request DELETE "https://httpbin.org/delete?key=value" --data "a=1&b=2&c=3"
+
+$curl = new Curl();
+$curl->delete('https://httpbin.org/delete',
+    array(
+        'key' => 'value',
+    ),
+    array(
+        'a' => '1',
+        'b' => '2',
+        'c' => '3',
+    )
+);
+
+if ($curl->error) {
+    echo 'Error: ' . $curl->errorCode . ': ' . $curl->errorMessage;
+} else {
+    echo 'Data server received via DELETE:' . "\n";
+    var_dump($curl->response->form);
+}