Update phpspec.

Author: jhedstrom

composer.json

@@ -20,7 +20,7 @@
   "require-dev": {
     "composer/installers": "^2.1",
     "drupal/coder": "~8.3.0",
-    "phpspec/phpspec": "~2.0 || ~4.0 || ~6.1 || dev-main",
+    "phpspec/phpspec": "~2.0 || ~4.0 || ~6.1 || ~7.5 || dev-main",
     "phpunit/phpunit": "~6.0 || ~7.0 || ^9 || ^10",
     "mockery/mockery": "^1.5",
     "drupal/core-composer-scaffold": "^8.4 || ^9 || ^10 || ^11",