Add Symfony Deprecation Contracts package

- Created CHANGELOG.md to maintain version history.
- Added README.md with usage instructions for the trigger_deprecation() function.
- Initialized composer.json for the Symfony Deprecation Contracts library, specifying dependencies and autoloading.

modules/pshowsso/deps/stevenmaguire/oauth2-keycloak/composer.json

@@ -0,0 +1,51 @@
+{
+    "name": "stevenmaguire/oauth2-keycloak",
+    "description": "Keycloak OAuth 2.0 Client Provider for The PHP League OAuth2-Client",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Steven Maguire",
+            "email": "stevenmaguire@gmail.com",
+            "homepage": "https://github.com/stevenmaguire"
+        }
+    ],
+    "keywords": [
+        "oauth",
+        "oauth2",
+        "client",
+        "authorization",
+        "authorisation",
+        "keycloak"
+    ],
+    "require": {
+        "php": "~7.2 || ~8.0",
+        "league/oauth2-client": "^2.0",
+        "firebase/php-jwt": "^6.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "~9.6.4",
+        "mockery/mockery": "~1.5.0",
+        "squizlabs/php_codesniffer": "~3.7.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Stevenmaguire\\OAuth2\\Client\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Stevenmaguire\\OAuth2\\Client\\Test\\": "test/src/"
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0.x-dev"
+        }
+    },
+    "scripts": {
+        "test": [
+            "@putenv XDEBUG_MODE=coverage",
+            "phpunit --colors=always"
+        ]
+    }
+}