Add "-" character to username regex matcher

app/src/main/java/chat/rocket/android/helper/MessageParser.kt

@@ -27,7 +27,7 @@ import javax.inject.Inject
 class MessageParser @Inject constructor(val context: Application, private val configuration: SpannableConfiguration) {
 
     private val parser = Markwon.createParser()
-    private val regexUsername = Pattern.compile("([^\\S]|^)+(@[\\w.]+)",
+    private val regexUsername = Pattern.compile("([^\\S]|^)+(@[\\w.\\-]+)",
             Pattern.MULTILINE or Pattern.CASE_INSENSITIVE)
     private val regexLink = Pattern.compile("(https?:\\/\\/)?(www\\.)?[-a-zA-Z0-9@:%._\\+~#=]{2,256}\\.[a-z]{2,6}\\b([-a-zA-Z0-9@:%_\\+.~#?&/=]*)",
             Pattern.MULTILINE or Pattern.CASE_INSENSITIVE)