php notice fixings

addons:
- bufferapp (missing errorcode)
- twitter (wrong field name 'nickname')
core:
- bbcode (incomplete attachementdata)
- crypto (uninitialized key)

src/Content/Text/BBCode.php

@@ -120,7 +120,16 @@ class BBCode extends BaseObject
 	 */
 	public static function getAttachmentData($body)
 	{
-		$data = [];
+		// Initialize empty data array
+		$data = [
+			'type'        => '',
+			'text'        => '',
+			'after'       => '',
+			'image'       => null,
+			'url'         => '',
+			'title'       => '',
+			'description' => '',
+		];
 
 		if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) {
 			return self::getOldAttachmentData($body);