Bump symfony/var-dumper from 5.2.8 to 5.3.0 in /server

Bumps [symfony/var-dumper](https://github.com/symfony/var-dumper) from 5.2.8 to 5.3.0.
- [Release notes](https://github.com/symfony/var-dumper/releases)
- [Changelog](https://github.com/symfony/var-dumper/blob/5.3/CHANGELOG.md)
- [Commits](https://github.com/symfony/var-dumper/compare/v5.2.8...v5.3.0)

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

server/composer.lock

@@ -2746,16 +2746,16 @@
         },
         {
             "name": "symfony/var-dumper",
-            "version": "v5.2.8",
+            "version": "v5.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-dumper.git",
-                "reference": "d693200a73fae179d27f8f1b16b4faf3e8569eba"
+                "reference": "1d3953e627fe4b5f6df503f356b6545ada6351f3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/d693200a73fae179d27f8f1b16b4faf3e8569eba",
-                "reference": "d693200a73fae179d27f8f1b16b4faf3e8569eba",
+                "url": "https://api.github.com/repos/symfony/var-dumper/zipball/1d3953e627fe4b5f6df503f356b6545ada6351f3",
+                "reference": "1d3953e627fe4b5f6df503f356b6545ada6351f3",
                 "shasum": ""
             },
             "require": {
@@ -2814,7 +2814,7 @@
                 "dump"
             ],
             "support": {
-                "source": "https://github.com/symfony/var-dumper/tree/v5.2.8"
+                "source": "https://github.com/symfony/var-dumper/tree/v5.3.0"
             },
             "funding": [
                 {
@@ -2830,7 +2830,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-05-07T13:42:21+00:00"
+            "time": "2021-05-27T12:28:50+00:00"
         },
         {
             "name": "twig/twig",