Issue #2720811 by Eric_A: Fix package names of drupal/core-fileCache and drupal/core-phpStorage

core/lib/Drupal/Component/FileCache/composer.json

 {
-  "name": "drupal/core-fileCache",
+  "name": "drupal/core-file-cache",
   "description": "FileCache.",
   "keywords": ["drupal"],
   "homepage": "https://www.drupal.org/project/drupal",

core/lib/Drupal/Component/PhpStorage/composer.json

 {
-  "name": "drupal/core-phpStorage",
+  "name": "drupal/core-php-storage",
   "description": "PhpStorage.",
   "keywords": ["drupal"],
   "homepage": "https://www.drupal.org/project/drupal",