Composer: Allow newer PHPUnit versions.

UlrichEckhardt · UlrichEckhardt · commit 05ccd9f3d37c · 2020-04-27T08:30:52.000+02:00
diff --git a/composer.json b/composer.json
@@ -17,7 +17,7 @@
     "ext-json": "*"
   },
   "require-dev": {
-    "phpunit/phpunit": "5.7.*|7.4.*",
+    "phpunit/phpunit": "^5.7|^7.4",
     "byjg/restserver": "3.1.*"
   },
   "autoload": {
