[TASK] rx_shariff and sg_comments are just suggestions

composer.json

 {
-  "name": "sgalinski/sg-news",
-  "type": "typo3-cms-extension",
-  "description": "News System",
-  "homepage": "https://www.sgalinski.de",
-  "license": ["GPL-2.0+"],
-  "version": "3.3.4",
-  "support": {
-  },
-  "repositories": [
-    {
-        "type": "composer",
-        "url": "https://packages.sgalinski.de/"
-    }
-  ],
-  "require": {
-    "typo3/cms-core": "^7.6",
-    "sgalinski/sg-comments": "^1.0"
-  },
-  "replace": {
-    "sg_news": "self.version"
-  },
-  "autoload": {
-    "psr-4": {
-      "SGalinski\\SgNews\\": "Classes/"
-    }
-  }
+	"name": "sgalinski/sg-news",
+	"type": "typo3-cms-extension",
+	"description": "News System",
+	"homepage": "https://www.sgalinski.de",
+	"license": [
+		"GPL-2.0+"
+	],
+	"version": "3.3.4",
+	"support": {
+	},
+	"repositories": [
+		{
+			"type": "composer",
+			"url": "https://packages.sgalinski.de/"
+		}
+	],
+	"require": {
+		"typo3/cms-core": "^7.6"
+	},
+	"suggest": {
+		"sgalinski/sg-comments": "Flexible comments system",
+		"typo3-ter/rx-shariff": "Social Share possibilities"
+	},
+	"replace": {
+		"sg_news": "self.version"
+	},
+	"autoload": {
+		"psr-4": {
+			"SGalinski\\SgNews\\": "Classes/"
+		}
+	}
 }