Updated all dependencies and prepared for PHP 8

composer.json

@@ -5,38 +5,35 @@
 	"homepage": "https://github.com/CloudObjects/phpMAE",
 	"license": "MPL-2.0",
 	"require": {
-		"symfony/console" : "^4.2.1",
-		"corveda/php-sandbox": "^2.0.1",
+		"symfony/console" : "^7",
+		"corveda/php-sandbox": "^3.1",
 		"cloudobjects/sdk" : "dev-main",
-		"php-di/php-di": "^6.0",
-		"slim/slim" : "^3.0",
+		"php-di/php-di": "^7.1.1",
+		"slim/slim" : "^4.0",
+		"slim/psr7" : "^1.6",
+		"slim/http" : "^1.3",
 		"jsonrpc/jsonrpc": "^1.0",
-		"vlucas/phpdotenv" : "^2.4.0",
-		"semsol/arc2" : "~2.3.1",
+		"vlucas/phpdotenv" : "^5.6.3",
+		"semsol/arc2" : "~3.0.0",
 		"cloudobjects/rdfutilities" : "dev-main",
-		"tuupola/slim-basic-auth": "^3.2",
-		"dflydev/fig-cookies": "^1.0",
-		"doctrine/collections": "^1.5",
-		"twig/twig": "^2.5",
-		"monolog/monolog": "^1.24",
-		"guzzlehttp/oauth-subscriber": "^0.3.0",
-		"webmozart/assert": "^1.3",
-		"psr/simple-cache": "^1.0",
-		"tuupola/cors-middleware": "^1.1",
-		"relay/relay": "^2.1",
-		"symfony/mailer": "^5.3"
+		"jimtools/basic-auth": "^1.0",
+		"dflydev/fig-cookies": "^3.2.0",
+		"doctrine/collections": "^3.0.0",
+		"twig/twig": "^3.27.0",
+		"monolog/monolog": "^3.10.0",
+		"webmozart/assert": "^1.6",
+		"psr/simple-cache": "^3.0",
+		"tuupola/cors-middleware": "^1.5",
+		"relay/relay": "^3.0",
+		"symfony/mailer": "^8.1.0"
 	},
 	"autoload": {
 		"psr-4": {
 			"CloudObjects\\PhpMAE\\" : "classes"
-		},
-		"files" : [
-			"vendor/semsol/arc2/ARC2_getFormat.php",
-			"vendor/semsol/arc2/ARC2_getPreferredFormat.php"			
-		]
+		}
 	},
 	"require-dev" : {
-		"phpunit/phpunit": "~5.7",
-		"consolidation/robo": "~1"
+		"phpunit/phpunit": "~8.5",
+		"consolidation/robo": "^5.1.1"
 	}
 }