Bump spatie/array-to-xml from 2.14.0 to 2.15.0 in /server

Bumps [spatie/array-to-xml](https://github.com/spatie/array-to-xml) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/spatie/array-to-xml/releases)
- [Changelog](https://github.com/spatie/array-to-xml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spatie/array-to-xml/compare/2.14.0...2.15.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

server/composer.json

@@ -8,7 +8,7 @@
         "delight-im/auth": "^8.2.2",
         "ulrichsg/getopt-php": "^3.4.0",
         "nikic/fast-route": "^2.0@dev",
-        "spatie/array-to-xml": "^2.14",
+        "spatie/array-to-xml": "^2.15",
         "ezyang/htmlpurifier": "^4.13",
         "netpromotion/profiler": "^1.3"
     },

server/composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0ee974b574c2f1dbe52a27273128e757",
+    "content-hash": "73172d5c29c5472320c4265054c957e3",
     "packages": [
         {
             "name": "delight-im/auth",
@@ -450,16 +450,16 @@
         },
         {
             "name": "spatie/array-to-xml",
-            "version": "2.14.0",
+            "version": "2.15.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/spatie/array-to-xml.git",
-                "reference": "15b5229fe8c9c14954b21f2bac0cc003ffbc54a5"
+                "reference": "1795afad4e5a1f4b7af2e0e09802550eaa00a6f8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/spatie/array-to-xml/zipball/15b5229fe8c9c14954b21f2bac0cc003ffbc54a5",
-                "reference": "15b5229fe8c9c14954b21f2bac0cc003ffbc54a5",
+                "url": "https://api.github.com/repos/spatie/array-to-xml/zipball/1795afad4e5a1f4b7af2e0e09802550eaa00a6f8",
+                "reference": "1795afad4e5a1f4b7af2e0e09802550eaa00a6f8",
                 "shasum": ""
             },
             "require": {
@@ -496,7 +496,7 @@
                 "convert",
                 "xml"
             ],
-            "time": "2020-09-14T19:07:17+00:00"
+            "time": "2020-10-29T18:11:03+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",