fix: Manual handler registration

Author: seebeen

composer.json

@@ -22,13 +22,14 @@
   },
   "require": {
     "php": ">=8.0",
-    "automattic/jetpack-constants": "^2|^3",
+    "automattic/jetpack-constants": "^2 || ^3",
     "php-di/php-di": "^7",
     "symfony/polyfill-php81": "^1.31",
     "x-wp/helper-classes": "^1.13",
     "x-wp/helper-functions": "^1.13"
   },
   "require-dev": {
+    "automattic/jetpack-autoloader": "*",
     "oblak/wordpress-coding-standard": "^1.1",
     "php-stubs/woocommerce-stubs": "^9.5",
     "php-stubs/wordpress-stubs": "^6.6",
@@ -37,19 +38,24 @@
     "phpstan/phpstan-deprecation-rules": "^1.2",
     "swissspidy/phpstan-no-private": "^0.2",
     "symfony/polyfill-php82": "^1.31",
+    "symfony/var-dumper": "^5.4",
     "szepeviktor/phpstan-wordpress": "^1.3",
-    "wp-cli/wp-cli": "^2.11"
+    "wp-cli/wp-cli": "^2.11",
+    "x-wp/whoops": "^1.1"
   },
   "conflict": {
     "oblak/wp-hook-di": "*"
   },
   "provide": {
-    "psr/container-implementation": "1.1|2.0",
+    "psr/container-implementation": "1.1 || 2.0",
     "x-wp/di-implementation": "self.version"
   },
   "suggest": {
     "automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."
   },
+  "autoload-dev": {
+    "XWP\\DI\\T\\": "test/fixtures/shared/"
+  },
   "autoload": {
     "psr-4": {
       "XWP\\DI\\": "src/"