Added software serial dependendy

Author: JoelJojoP

library.properties

@@ -6,4 +6,5 @@ sentence=An easy to use library to interface LSA08 line sensor with MCU.
 paragraph=This library consists of functions for interfacing LSA08 line sensor with MCU via Serial, SoftwareSerial or analog input. The library also supports device control via Serial/SoftwareSerial
 category=Sensors
 url=https://github.com/csd-robocon-nitk/LSA08_Simplified
-architectures=*
+architectures=*
+depends=SoftwareSerial