set phpunit to fixed 8.4.1 in favor of https://github.com/sebastianbergmann/phpunit/issues/3793 to not break jenkins testing for now

Signed-off-by: Michael Kaufmann <d00p@froxlor.org>

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": "77819131afd1abe70f1ea6caad9fc3e5",
+    "content-hash": "5699c65bbdcd2a61a9ced0ac7be84d64",
     "packages": [
         {
             "name": "algo26-matthias/idna-convert",
@@ -1238,16 +1238,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "8.4.2",
+            "version": "8.4.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "a142a7e66c0ea7b5b6c04ee27f08d10d1137cd9b"
+                "reference": "366a4a0f2b971fd43b7c351d621e8dd7d7131869"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/a142a7e66c0ea7b5b6c04ee27f08d10d1137cd9b",
-                "reference": "a142a7e66c0ea7b5b6c04ee27f08d10d1137cd9b",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/366a4a0f2b971fd43b7c351d621e8dd7d7131869",
+                "reference": "366a4a0f2b971fd43b7c351d621e8dd7d7131869",
                 "shasum": ""
             },
             "require": {
@@ -1317,7 +1317,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2019-10-28T10:39:51+00:00"
+            "time": "2019-10-07T12:57:41+00:00"
         },
         {
             "name": "psr/container",