adjusted composer.json for smarty and twig

not need to suggest packages in core. They are required by extension
composer.json anyway.

extensions/smarty/composer.json

@@ -20,7 +20,7 @@
 	"minimum-stability": "dev",
 	"require": {
 		"yiisoft/yii2": "*",
-		"smarty/smarty": "v3.1.13"
+		"smarty/smarty": ">=v3.1.13"
 	},
 	"autoload": {
 		"psr-0": { "yii\\smarty\\": "" }

framework/composer.json

@@ -74,8 +74,6 @@
 		"psr-0": { "yii\\": "/" }
 	},
 	"suggest": {
-		"michelf/php-markdown": "Required by Markdown.",
-		"twig/twig": "Required by TwigViewRenderer.",
-		"smarty/smarty": "Required by SmartyViewRenderer."
+		"michelf/php-markdown": "Required by Markdown."
 	}
 }