Bump jms/serializer from 3.20.0 to 3.21.0

Bumps [jms/serializer](https://github.com/schmittjoh/serializer) from 3.20.0 to 3.21.0.
- [Release notes](https://github.com/schmittjoh/serializer/releases)
- [Changelog](https://github.com/schmittjoh/serializer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/schmittjoh/serializer/compare/3.20.0...3.21.0)

---
updated-dependencies:
- dependency-name: jms/serializer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

composer.lock

@@ -5018,16 +5018,16 @@
         },
         {
             "name": "jms/serializer",
-            "version": "3.20.0",
+            "version": "3.21.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/schmittjoh/serializer.git",
-                "reference": "0fa5e4f332fdce524aef5e5d4572d98d30168437"
+                "reference": "cc49ca6cd97baa173166c1f4fc54521964cf28bd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/0fa5e4f332fdce524aef5e5d4572d98d30168437",
-                "reference": "0fa5e4f332fdce524aef5e5d4572d98d30168437",
+                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/cc49ca6cd97baa173166c1f4fc54521964cf28bd",
+                "reference": "cc49ca6cd97baa173166c1f4fc54521964cf28bd",
                 "shasum": ""
             },
             "require": {
@@ -5102,7 +5102,7 @@
             ],
             "support": {
                 "issues": "https://github.com/schmittjoh/serializer/issues",
-                "source": "https://github.com/schmittjoh/serializer/tree/3.20.0"
+                "source": "https://github.com/schmittjoh/serializer/tree/3.21.0"
             },
             "funding": [
                 {
@@ -5110,7 +5110,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2023-01-06T21:17:32+00:00"
+            "time": "2023-01-10T13:08:17+00:00"
         },
         {
             "name": "jms/serializer-bundle",