dependency updates

Author: codemasher

composer.json

@@ -31,7 +31,7 @@
 		"ext-json":"*",
 		"ext-simplexml":"*",
 		"ext-zlib":"*",
-		"chillerlan/php-settings-container":"^1.0",
+		"chillerlan/php-settings-container":"^1.1",
 		"fig/http-message-util":"^1.1",
 		"psr/http-client":"^1.0",
 		"psr/http-message": "^1.0",
@@ -41,8 +41,8 @@
 		"psr/log": "^1.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "^8.0",
-		"guzzlehttp/psr7": "^1.5",
+		"phpunit/phpunit": "^8.3",
+		"guzzlehttp/psr7": "^1.6",
 		"http-interop/http-factory-tests": "dev-master"
 	},
 	"autoload": {