Update ramsey/uuid requirement from ^3.8 to ^3.8 || ^4.0 (#387)

Updates the requirements on [ramsey/uuid](https://github.com/ramsey/uuid) to permit the latest version.
- [Release notes](https://github.com/ramsey/uuid/releases)
- [Changelog](https://github.com/ramsey/uuid/blob/master/CHANGELOG.md)
- [Commits](ramsey/uuid@3.8.0...4.0.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

composer.json

@@ -19,7 +19,7 @@
   "require": {
     "php": "^7.4",
     "ext-json": "*",
-    "ramsey/uuid": "^3.8"
+    "ramsey/uuid": "^3.8 || ^4.0"
   },
   "require-dev": {
     "amphp/amp": "^2.1.2",