Minor dev composer update (#4424)

Follow-up of https://github.com/FreshRSS/FreshRSS/pull/4419

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": "a6bb93b0e476958b7daf544f61ddecd7",
+    "content-hash": "a51faa9a0e83f4566bf5f07e33483e6a",
     "packages": [],
     "packages-dev": [
         {
@@ -909,16 +909,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.20",
+            "version": "9.5.21",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "12bc8879fb65aef2138b26fc633cb1e3620cffba"
+                "reference": "0e32b76be457de00e83213528f6bb37e2a38fcb1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/12bc8879fb65aef2138b26fc633cb1e3620cffba",
-                "reference": "12bc8879fb65aef2138b26fc633cb1e3620cffba",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/0e32b76be457de00e83213528f6bb37e2a38fcb1",
+                "reference": "0e32b76be457de00e83213528f6bb37e2a38fcb1",
                 "shasum": ""
             },
             "require": {
@@ -952,7 +952,6 @@
                 "sebastian/version": "^3.0.2"
             },
             "require-dev": {
-                "ext-pdo": "*",
                 "phpspec/prophecy-phpunit": "^2.0.1"
             },
             "suggest": {
@@ -996,7 +995,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.20"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.21"
             },
             "funding": [
                 {
@@ -1008,7 +1007,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-04-01T12:37:26+00:00"
+            "time": "2022-06-19T12:14:25+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -2145,8 +2144,10 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=7.0.0"
+        "php": ">=7.0"
+    },
+    "platform-dev": {
+        "php": ">=8.0"
     },
-    "platform-dev": [],
     "plugin-api-version": "2.2.0"
 }