Issue #2998296 by Mile23: drupal-phpunit-upgrade should also update prophecy

composer.json

@@ -53,7 +53,7 @@
         "post-package-install": "Drupal\\Core\\Composer\\Composer::vendorTestCodeCleanup",
         "post-package-update": "Drupal\\Core\\Composer\\Composer::vendorTestCodeCleanup",
         "drupal-phpunit-upgrade-check": "Drupal\\Core\\Composer\\Composer::upgradePHPUnit",
-        "drupal-phpunit-upgrade": "@composer update phpunit/phpunit --with-dependencies --no-progress",
+        "drupal-phpunit-upgrade": "@composer update phpunit/phpunit phpspec/prophecy symfony/yaml --with-dependencies --no-progress",
         "phpcs": "phpcs --standard=core/phpcs.xml.dist --runtime-set installed_paths $($COMPOSER_BINARY config vendor-dir)/drupal/coder/coder_sniffer --",
         "phpcbf": "phpcbf --standard=core/phpcs.xml.dist --runtime-set installed_paths $($COMPOSER_BINARY config vendor-dir)/drupal/coder/coder_sniffer --"
     },

core/composer.json

@@ -59,7 +59,7 @@
         "jcalderonzumba/mink-phantomjs-driver": "^0.3.1",
         "mikey179/vfsStream": "^1.2",
         "phpunit/phpunit": "^4.8.35 || ^6.5",
-        "phpspec/prophecy": "^1.4",
+        "phpspec/prophecy": "^1.7",
         "symfony/css-selector": "^3.4.0",
         "symfony/phpunit-bridge": "^3.4.3",
         "symfony/debug": "^3.4.0"